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Immunogenicity and Safety of GBS-NN/NN2 in Pregnant Women

A Multicentre, Multinational, Parallel Group, Observer-blind, Randomised, Placebo-controlled Study on the Group B Streptococcus Vaccine (GBS-NN/NN2), Investigating the Immunogenicity and Safety of Four Vaccination Regimens in Pregnant Woman, Assessing IgG Specific to AlpN Proteins in Cord Blood and Maternal Blood, and the Safety Profile in Mother and Infant up to 6 Months Post-delivery

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05154578
Enrollment
269
Registered
2021-12-13
Start date
2022-02-17
Completion date
2023-10-18
Last updated
2025-06-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Group B Streptococcal Infection

Brief summary

This is a phase II, multicentre, multinational, randomized, parallel group, placebo-controlled study of four vaccination regimens in healthy pregnant women. There will be 5 treatment groups; three groups of 60 participants will receive will receive two doses of GBS-NN/NN2 vaccine and one dose of placebo (saline); one group of 60 participants will receive one dose of GBS-NN/NN2 vaccine and two doses of placebo (saline), and one group of 30 participants will receive three doses of placebo (saline).

Detailed description

This is a phase II, multicentre, multinational, randomized, parallel group, placebo-controlled study of four vaccination regimens in healthy pregnant women. There will be 5 treatment groups; Group 1 will receive one injection of placebo at 22 (±1) weeks gestational age (GA), one injection of GBS-NN/NN2 at 26 (±1) weeks GA and one injection of GBS- NN/NN2 at 30 (±1) weeks GA. Group 2 will receive one injection of GBS-NN/NN2 at 22 (±1) weeks GA, one injection of GBS-NN/NN2 at 26 (±1) weeks GA and one injection of placebo at 30 (±1) weeks GA.Group 3 will receive one injection of GBS-NN/NN2 at 22 (±1) weeks GA, one injection of placebo at 26 (±1) weeks GA and one injection of GBS- NN/NN2 at 30 (±1) weeks GA. Group 4 will receive one injection of placebo at 22 (±1) weeks GA, one injection of GBS-NN/NN2 at 26 (±1) weeks GA and one injection of placebo at 30 (±1) weeks GA. Group 5 will receive an injection of placebo at 22, 26 and 30 weeks (±1) GA. Participants will attend the clinic for assessment visits up to delivery and for a further 3 visits at 28 (±4) days, 90 (±6) days and 180 (±14) days post delivery. Babies will be also be assessed at delivery, and 28 (±4) days, 90 (±6) days and 180 (±14) days post delivery.

Interventions

0.5 mL GBS-NN/NN2 containing 50 μg of GBS-NN and 50 μg of GBS-NN2 and 0.5 mg of aluminium, given by intramuscular injection.

BIOLOGICALPlacebo

0.5 mL normal saline given by intramuscular injection

Sponsors

Larix A/S
CollaboratorINDUSTRY
Minervax ApS
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)

Intervention model description

Participants will be randomized to one of 5 groups

Eligibility

Sex/Gender
FEMALE
Healthy volunteers
Yes

Inclusion criteria

1. Healthy pregnant woman above the legally defined age of consent at the time of screening 2. Carrying a normal singleton pregnancy, and is at 21+0 to 23+6 weeks GA at the planned tme of the 1st vaccination, as established by first/second trimester ultrasound examination 3. Properly informed about the study and has given written informed consent and parental consent (for her baby) in accordance with the International Conference on Harmonization Good Clinical Practice (ICH GCP) and local legislation prior to the first study intervention 4. Grants access to her own and her baby's study related medical records

Exclusion criteria

1. Previous vaccination with an investigational Group B Streptococcus (GBS) Vaccine 2. BMI of \<17 or \>40 at the time of screening 3. Human immunodeficiency virus (HIV), hepatitis B virus (HBV) and/or hepatitis C virus (HCV) positive or positive for syphilis 4. Knowingly carrying, at screening, a malformed or genetically abnormal foetus, incl. renal pelvis dilation, single umbilical artery (screening will be undertaken after the ultrasound conducted for the detection of anomalies) 5. Chronic or pregnancy induced hypertension at screening, \>1+ protein in urine regardless of blood pressure or 1+ protein in urine and hypertension 6. Experienced a previous stillbirth prior to going into labour 7. Gestational, type 1 or type 2 diabetes 8. Potential placenta previa as per malformation ultrasound scan 9. Rhesus negative and has anti-D antibodies or other potential harmful antibodies 10. Known or suspected allergies to any components of the vaccine including to aluminium or aminoglycoside antibiotics, or an allergic reaction related to a previous vaccination 11. Fever (temperature \>37.9°C) on the day of receiving the first dose or an acute infection in the 7 days before the first dose (the first dose can be delayed if gestational age permits) 12. Received systemic steroids in the 6 weeks before the first dose (inhaled and topical steroids are acceptable) 13. Any lesion (including tattoos) at the planned injection site that will impair the assessment of the injection site 14. Received immunosuppressive medication, chemotherapy or radiotherapy in the 24 weeks before the first dose 15. Received blood, blood products, plasma derivatives or any immunoglobulin preparations in the 12 weeks before the first dose 16. Anaemia, haemoglobin (\<10 g/dL, 100 g/L, 6.2 mmol/L) 17. Currently breast feeding 18. Received any investigational medicinal product or vaccine in the 12 weeks or 5 half-lives before the first dose 19. Received an approved vaccine within the 4 weeks before the first dose or expects to receive an approved vaccine during the study. Routine vaccinations recommended during pregnancy (e.g., pertussis and influenza) are permitted but every effort should be made to separate routine vaccinations from the trial vaccinations by at least 7 days. 20. Known or suspected immunodeficiency or cancer (leukaemia, lymphoma), or a family history of congenital or hereditary immunodeficiency 21. History or presence of uncontrolled cardiovascular disease, pulmonary, hepatic, gall bladder or biliary tract, renal, haematological, gastrointestinal, endocrine, immunologic, dermatological, neurological, psychiatric, or autoimmune disease 22. History of, or current drug or alcohol abuse 23. In the opinion of the investigator not suitable for inclusion in the study 24. The pregnancy is considered high risk by treating physicians

Design outcomes

Primary

MeasureTime frameDescription
Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyDeliveryConcentrations of IgG antibodies specific to the AlpN proteins in μg/mL in cord blood from each baby at birth.

Secondary

MeasureTime frameDescription
Adverse Events Following the Vaccinations in the MotherTo Day 84Number of participants with solicited and other adverse events following the vaccinations
Clinically Significant Abnormal Laboratory Tests in the MotherTo Day 84Number of participants with clinically significant abnormal laboratory tests in the mother
Clinically Significant Changes in Vital Signs in the MotherTo Day 84Number of participants with clinically significant changes in vital signs (heart rate, blood pressure, oral temperature) in the mother
Clinically Significant Changes in Physical Examination in the MotherTo Day 84Number of participants with clinically significant changes in physical examination in the mother
Gestational AgeDeliveryGestational age at birth
Injection Site Reactions in the Mother7 days following each injectionNumber of participants with solicited injection site reactions following vaccination
Length of the BabyDeliveryLength of the baby
Head Circumference of the BabyDeliveryHead circumference of the baby
Apgar Score in the Baby1, 5 and 10 minutesApgar score in the baby (Appearance; Pulse; Grimace response; Activity; Respiration). Range 0 to 10 where high scores are good and low scores are bad.
Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodDeliveryConcentrations of IgG antibodies specific to the AlpN proteins in μg/mL in maternal blood
Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each Baby1 month, 3 monthsConcentrations of IgG antibodies specific to the AlpN proteins in μg/mL in blood from each baby
Weight of the BabyDeliveryWeight of the baby

Countries

Denmark, South Africa, United Kingdom

Participant flow

Recruitment details

The first participant first visit took place on 17 February 2022 and the last participant last visit took place on 18 October 2023.

Pre-assignment details

A total of 269 maternal participants were enrolled in the study and randomised to one of the 5 study groups.

Participants by arm

ArmCount
Group 1: 4 Week Dose Interval; 2 Doses
Participants received one injection of placebo at 22 (±1) weeks GA (gestational age), one injection of GBS-NN/NN2 at 26 (±1) weeks GA and one injection of GBS- NN/NN2 at 30 (±1) weeks GA GBS-NN/NN2 Vaccine: 0.5 mL GBS-NN/NN2 containing 50 μg of GBS-NN and 50 μg of GBS-NN2 and 0.5 mg of aluminium, given by intramuscular injection. Placebo: 0.5 mL normal saline given by intramuscular injection
61
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses
Participants received one injection of GBS-NN/NN2 at 22 (±1) weeks GA, one injection of GBS-NN/NN2 at 26 (±1) weeks GA and one injection of placebo at 30 (±1) weeks GA GBS-NN/NN2 Vaccine: 0.5 mL GBS-NN/NN2 containing 50 μg of GBS-NN and 50 μg of GBS-NN2 and 0.5 mg of aluminium, given by intramuscular injection. Placebo: 0.5 mL normal saline given by intramuscular injection
59
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses
Participants received one injection of GBS-NN/NN2 at 22 (±1) weeks GA, one injection of placebo at 26 (±1) weeks GA and one injection of GBS- NN/NN2 at 30 (±1) weeks GA GBS-NN/NN2 Vaccine: 0.5 mL GBS-NN/NN2 containing 50 μg of GBS-NN and 50 μg of GBS-NN2 and 0.5 mg of aluminium, given by intramuscular injection. Placebo: 0.5 mL normal saline given by intramuscular injection
59
Group 4: Single Dose
Participants received one injection of placebo at 22 (±1) weeks GA, one injection of GBS-NN/NN2 at 26 (±1) weeks GA, and one injection of placebo at 30 (±1) weeks GA. GBS-NN/NN2 Vaccine: 0.5 mL GBS-NN/NN2 containing 50 μg of GBS-NN and 50 μg of GBS-NN2 and 0.5 mg of aluminium, given by intramuscular injection. Placebo: 0.5 mL normal saline given by intramuscular injection
60
Group 5: Placebo
Participants received one injection of placebo at 22, 26 and 30 weeks (±1) GA Placebo: 0.5 mL normal saline given by intramuscular injection
30
Total269

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004
Overall StudyAdverse Event00010
Overall StudyBaby loss01000
Overall StudyLost to Follow-up01030
Overall StudyRelocated to another province00101
Overall StudyWithdrawal by Subject23240

Baseline characteristics

CharacteristicGroup 1: 4 Week Dose Interval; 2 DosesGroup 2: Early Intervention; 4 Week Dose Interval; 2 DosesGroup 3: Early Intervention; 8 Week Dose Interval; 2 DosesGroup 4: Single DoseGroup 5: PlaceboTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
61 Participants59 Participants59 Participants60 Participants30 Participants269 Participants
Age, Continuous28.9 years
STANDARD_DEVIATION 5.26
27.5 years
STANDARD_DEVIATION 4.81
27.8 years
STANDARD_DEVIATION 5.34
27.3 years
STANDARD_DEVIATION 5.37
28.3 years
STANDARD_DEVIATION 6.65
27.9 years
STANDARD_DEVIATION 5.37
BMI27.2 kg/m²
STANDARD_DEVIATION 5.28
27.9 kg/m²
STANDARD_DEVIATION 5.32
27.6 kg/m²
STANDARD_DEVIATION 5.35
27.5 kg/m²
STANDARD_DEVIATION 5.57
28.8 kg/m²
STANDARD_DEVIATION 5.38
27.7 kg/m²
STANDARD_DEVIATION 5.36
Ethnicity (NIH/OMB)
Hispanic or Latino
2 Participants0 Participants1 Participants0 Participants1 Participants4 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
59 Participants59 Participants58 Participants60 Participants29 Participants265 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Height161.7 cm
STANDARD_DEVIATION 7.84
162.2 cm
STANDARD_DEVIATION 8
163.3 cm
STANDARD_DEVIATION 7.58
160.5 cm
STANDARD_DEVIATION 6.88
160.5 cm
STANDARD_DEVIATION 6.92
161.8 cm
STANDARD_DEVIATION 7.53
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
1 Participants0 Participants0 Participants2 Participants0 Participants3 Participants
Race (NIH/OMB)
Black or African American
44 Participants41 Participants43 Participants44 Participants22 Participants194 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
White
16 Participants18 Participants16 Participants14 Participants8 Participants72 Participants
Region of Enrollment
Denmark
13 participants14 participants12 participants13 participants7 participants59 participants
Region of Enrollment
South Africa
44 participants42 participants43 participants44 participants22 participants195 participants
Region of Enrollment
United Kingdom
4 participants3 participants4 participants3 participants1 participants15 participants
Sex: Female, Male
Female
61 Participants59 Participants59 Participants60 Participants30 Participants269 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Weight71.1 kg
STANDARD_DEVIATION 14
73.0 kg
STANDARD_DEVIATION 12.11
73.6 kg
STANDARD_DEVIATION 14.52
70.6 kg
STANDARD_DEVIATION 14.59
74.2 kg
STANDARD_DEVIATION 13.38
72.3 kg
STANDARD_DEVIATION 13.76

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
EG006
affected / at risk
EG007
affected / at risk
EG008
affected / at risk
EG009
affected / at risk
deaths
Total, all-cause mortality
0 / 610 / 590 / 590 / 600 / 302 / 612 / 581 / 583 / 571 / 29
other
Total, other adverse events
56 / 6154 / 5957 / 5956 / 6026 / 3043 / 6138 / 5838 / 5845 / 5721 / 29
serious
Total, serious adverse events
23 / 6112 / 5920 / 5925 / 6014 / 3015 / 6113 / 5816 / 5817 / 577 / 29

Outcome results

Primary

Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each Baby

Concentrations of IgG antibodies specific to the AlpN proteins in μg/mL in cord blood from each baby at birth.

Time frame: Delivery

Population: Baby Immunogenicicty Set : babies with at least one evaluable sample.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp1N11.12 μg/mLGeometric Coefficient of Variation 236.7
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp2N7.93 μg/mLGeometric Coefficient of Variation 164
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlpCN8.85 μg/mLGeometric Coefficient of Variation 246.7
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyRibN3.67 μg/mLGeometric Coefficient of Variation 157.6
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp1N5.52 μg/mLGeometric Coefficient of Variation 183.9
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyRibN1.76 μg/mLGeometric Coefficient of Variation 434.2
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp2N5.32 μg/mLGeometric Coefficient of Variation 280.9
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlpCN6.71 μg/mLGeometric Coefficient of Variation 337.4
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyRibN3.23 μg/mLGeometric Coefficient of Variation 283.3
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp2N5.46 μg/mLGeometric Coefficient of Variation 445.7
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlpCN7.39 μg/mLGeometric Coefficient of Variation 374.6
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp1N7.95 μg/mLGeometric Coefficient of Variation 261.6
Group 4: Single Dose (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp1N3.51 μg/mLGeometric Coefficient of Variation 565.2
Group 4: Single Dose (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp2N3.39 μg/mLGeometric Coefficient of Variation 717.6
Group 4: Single Dose (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyRibN1.28 μg/mLGeometric Coefficient of Variation 520.6
Group 4: Single Dose (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlpCN3.10 μg/mLGeometric Coefficient of Variation 682
Group 5: Placebo (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyRibN0.06 μg/mLGeometric Coefficient of Variation 129.4
Group 5: Placebo (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlpCN0.06 μg/mLGeometric Coefficient of Variation 137.5
Group 5: Placebo (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp2N0.04 μg/mLGeometric Coefficient of Variation 112.9
Group 5: Placebo (Infant Participants)Concentrations of Immunoglobulin (Ig) G Antibodies Specific to the AlpN Proteins in μg/mL in Cord Blood From Each BabyAlp1N0.07 μg/mLGeometric Coefficient of Variation 102.2
Secondary

Adverse Events Following the Vaccinations in the Mother

Number of participants with solicited and other adverse events following the vaccinations

Time frame: To Day 84

ArmMeasureValue (NUMBER)
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Adverse Events Following the Vaccinations in the Mother56 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Adverse Events Following the Vaccinations in the Mother54 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Adverse Events Following the Vaccinations in the Mother57 participants
Group 4: Single Dose (Infant Participants)Adverse Events Following the Vaccinations in the Mother56 participants
Group 5: Placebo (Infant Participants)Adverse Events Following the Vaccinations in the Mother26 participants
Secondary

Apgar Score in the Baby

Apgar score in the baby (Appearance; Pulse; Grimace response; Activity; Respiration). Range 0 to 10 where high scores are good and low scores are bad.

Time frame: 1, 5 and 10 minutes

Population: Baby safety analysis set

ArmMeasureGroupValue (MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 10 minutes9.9 score on a scaleStandard Deviation 0.29
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 5 minutes9.7 score on a scaleStandard Deviation 1.34
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 1 minute8.8 score on a scaleStandard Deviation 1.39
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 5 minutes9.8 score on a scaleStandard Deviation 0.54
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 1 minute9.0 score on a scaleStandard Deviation 0.91
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 10 minutes9.9 score on a scaleStandard Deviation 0.28
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 10 minutes9.9 score on a scaleStandard Deviation 0.33
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 1 minute8.8 score on a scaleStandard Deviation 1
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Apgar Score in the BabyAPGAR score at 5 minutes9.8 score on a scaleStandard Deviation 0.6
Group 4: Single Dose (Infant Participants)Apgar Score in the BabyAPGAR score at 10 minutes9.9 score on a scaleStandard Deviation 0.29
Group 4: Single Dose (Infant Participants)Apgar Score in the BabyAPGAR score at 1 minute8.9 score on a scaleStandard Deviation 1.38
Group 4: Single Dose (Infant Participants)Apgar Score in the BabyAPGAR score at 5 minutes9.9 score on a scaleStandard Deviation 0.32
Group 5: Placebo (Infant Participants)Apgar Score in the BabyAPGAR score at 1 minute8.8 score on a scaleStandard Deviation 1.22
Group 5: Placebo (Infant Participants)Apgar Score in the BabyAPGAR score at 5 minutes9.8 score on a scaleStandard Deviation 0.62
Group 5: Placebo (Infant Participants)Apgar Score in the BabyAPGAR score at 10 minutes10.0 score on a scaleStandard Deviation 0
Secondary

Clinically Significant Abnormal Laboratory Tests in the Mother

Number of participants with clinically significant abnormal laboratory tests in the mother

Time frame: To Day 84

ArmMeasureValue (NUMBER)
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Abnormal Laboratory Tests in the Mother0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Abnormal Laboratory Tests in the Mother0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Abnormal Laboratory Tests in the Mother0 participants
Group 4: Single Dose (Infant Participants)Clinically Significant Abnormal Laboratory Tests in the Mother0 participants
Group 5: Placebo (Infant Participants)Clinically Significant Abnormal Laboratory Tests in the Mother0 participants
Secondary

Clinically Significant Changes in Physical Examination in the Mother

Number of participants with clinically significant changes in physical examination in the mother

Time frame: To Day 84

ArmMeasureValue (NUMBER)
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Physical Examination in the Mother0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Physical Examination in the Mother0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Physical Examination in the Mother0 participants
Group 4: Single Dose (Infant Participants)Clinically Significant Changes in Physical Examination in the Mother0 participants
Group 5: Placebo (Infant Participants)Clinically Significant Changes in Physical Examination in the Mother0 participants
Secondary

Clinically Significant Changes in Vital Signs in the Mother

Number of participants with clinically significant changes in vital signs (heart rate, blood pressure, oral temperature) in the mother

Time frame: To Day 84

ArmMeasureValue (NUMBER)
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Vital Signs in the Mother0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Vital Signs in the Mother0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Clinically Significant Changes in Vital Signs in the Mother0 participants
Group 4: Single Dose (Infant Participants)Clinically Significant Changes in Vital Signs in the Mother0 participants
Group 5: Placebo (Infant Participants)Clinically Significant Changes in Vital Signs in the Mother0 participants
Secondary

Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each Baby

Concentrations of IgG antibodies specific to the AlpN proteins in μg/mL in blood from each baby

Time frame: 1 month, 3 months

Population: Baby Immunogenicicty Set : babies with at least one evaluable sample.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 1 month of age4.81 μg/mLGeometric Coefficient of Variation 419.4
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 3 months of age1.91 μg/mLGeometric Coefficient of Variation 270.3
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 1 month of age4.25 μg/mLGeometric Coefficient of Variation 379.8
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 3 months of age1.73 μg/mLGeometric Coefficient of Variation 239.6
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 1 month of age4.90 μg/mLGeometric Coefficient of Variation 495.8
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 3 months of age1.92 μg/mLGeometric Coefficient of Variation 289.2
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 1 month of age2.46 μg/mLGeometric Coefficient of Variation 190.5
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 3 months of age0.88 μg/mLGeometric Coefficient of Variation 190.2
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 1 month of age2.87 μg/mLGeometric Coefficient of Variation 281.3
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 3 months of age1.15 μg/mLGeometric Coefficient of Variation 323.8
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 1 month of age2.92 μg/mLGeometric Coefficient of Variation 184.7
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 3 months of age1.05 μg/mLGeometric Coefficient of Variation 256.2
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 3 months of age1.24 μg/mLGeometric Coefficient of Variation 149
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 3 months of age0.45 μg/mLGeometric Coefficient of Variation 219.1
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 1 month of age3.44 μg/mLGeometric Coefficient of Variation 264.8
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 1 month of age1.13 μg/mLGeometric Coefficient of Variation 223.6
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 1 month of age2.13 μg/mLGeometric Coefficient of Variation 264.1
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 3 months of age0.78 μg/mLGeometric Coefficient of Variation 271.9
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 3 months of age1.37 μg/mLGeometric Coefficient of Variation 247.2
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 3 months of age1.67 μg/mLGeometric Coefficient of Variation 214.1
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 1 month of age3.91 μg/mLGeometric Coefficient of Variation 283.4
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 3 months of age2.26 μg/mLGeometric Coefficient of Variation 152.6
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 1 month of age7.02 μg/mLGeometric Coefficient of Variation 116.3
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 1 month of age4.64 μg/mLGeometric Coefficient of Variation 399
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 3 months of age0.54 μg/mLGeometric Coefficient of Variation 515.7
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 1 month of age1.43 μg/mLGeometric Coefficient of Variation 916.8
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 3 months of age0.59 μg/mLGeometric Coefficient of Variation 427.3
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 1 month of age1.50 μg/mLGeometric Coefficient of Variation 1065.8
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 3 months of age0.49 μg/mLGeometric Coefficient of Variation 436
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 3 months of age0.22 μg/mLGeometric Coefficient of Variation 465.2
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 1 month of age1.72 μg/mLGeometric Coefficient of Variation 983.6
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 1 month of age0.77 μg/mLGeometric Coefficient of Variation 560.9
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 3 months of age0.02 μg/mLGeometric Coefficient of Variation 102
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 3 months of age0.03 μg/mLGeometric Coefficient of Variation 92.1
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp2N: At 1 month of age0.05 μg/mLGeometric Coefficient of Variation 534
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyRibN: At 1 month of age0.05 μg/mLGeometric Coefficient of Variation 237.2
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 1 month of age0.05 μg/mLGeometric Coefficient of Variation 424.7
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 3 months of age0.03 μg/mLGeometric Coefficient of Variation 106.5
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlp1N: At 3 months of age0.03 μg/mLGeometric Coefficient of Variation 127.2
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Blood From Each BabyAlpCN: At 1 month of age0.07 μg/mLGeometric Coefficient of Variation 384.9
Secondary

Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal Blood

Concentrations of IgG antibodies specific to the AlpN proteins in μg/mL in maternal blood

Time frame: Delivery

Population: Baby Immunogenicicty Set : babies with at least one evaluable sample.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp1N40.57 μg/mLGeometric Coefficient of Variation 271
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp2N61.69 μg/mLGeometric Coefficient of Variation 384.9
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlpCN48.11 μg/mLGeometric Coefficient of Variation 314.7
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodRibN25.55 μg/mLGeometric Coefficient of Variation 323.2
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp1N15.81 μg/mLGeometric Coefficient of Variation 295.1
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodRibN10.97 μg/mLGeometric Coefficient of Variation 305.5
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp2N32.74 μg/mLGeometric Coefficient of Variation 275.1
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlpCN25.17 μg/mLGeometric Coefficient of Variation 328.6
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodRibN20.08 μg/mLGeometric Coefficient of Variation 473.4
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp2N39.54 μg/mLGeometric Coefficient of Variation 239.9
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlpCN27.53 μg/mLGeometric Coefficient of Variation 332.7
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp1N32.91 μg/mLGeometric Coefficient of Variation 322.2
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp1N12.38 μg/mLGeometric Coefficient of Variation 604.4
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp2N18.96 μg/mLGeometric Coefficient of Variation 491.4
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodRibN8.68 μg/mLGeometric Coefficient of Variation 614.4
Group 4: Single Dose (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlpCN16.38 μg/mLGeometric Coefficient of Variation 482.6
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodRibN0.92 μg/mLGeometric Coefficient of Variation 74.4
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlpCN1.10 μg/mLGeometric Coefficient of Variation 86.4
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp2N1.02 μg/mLGeometric Coefficient of Variation 95.9
Group 5: Placebo (Infant Participants)Concentrations of IgG Antibodies Specific to the AlpN Proteins in μg/mL in Maternal BloodAlp1N1.03 μg/mLGeometric Coefficient of Variation 85.3
Secondary

Gestational Age

Gestational age at birth

Time frame: Delivery

Population: Baby safety analysis set

ArmMeasureValue (MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Gestational Age38.7 weeksStandard Deviation 2.88
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Gestational Age38.9 weeksStandard Deviation 2.39
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Gestational Age38.9 weeksStandard Deviation 2.3
Group 4: Single Dose (Infant Participants)Gestational Age38.8 weeksStandard Deviation 2.37
Group 5: Placebo (Infant Participants)Gestational Age39.4 weeksStandard Deviation 1.45
Secondary

Head Circumference of the Baby

Head circumference of the baby

Time frame: Delivery

Population: Baby safety analysis set

ArmMeasureValue (MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Head Circumference of the Baby34.4 centimetersStandard Deviation 1.83
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Head Circumference of the Baby34.3 centimetersStandard Deviation 1.68
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Head Circumference of the Baby33.8 centimetersStandard Deviation 2.49
Group 4: Single Dose (Infant Participants)Head Circumference of the Baby34.0 centimetersStandard Deviation 2.19
Group 5: Placebo (Infant Participants)Head Circumference of the Baby34.8 centimetersStandard Deviation 1.6
Secondary

Injection Site Reactions in the Mother

Number of participants with solicited injection site reactions following vaccination

Time frame: 7 days following each injection

ArmMeasureGroupValue (NUMBER)
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 2.5 - 5.0 cm0 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 0 - 2.4 cm5 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : >10 cm0 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Severe0 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : Palpable firmness only14 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Moderate3 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Mild35 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 2.5 - 5.0 cm2 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 0 - 2.4 cm7 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherItching23 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Severe0 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Moderate15 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 5.1 - 10.0 cm0 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Mild14 participants
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 5.1 - 10.0 cm0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Severe0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 0 - 2.4 cm5 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 2.5 - 5.0 cm1 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 5.1 - 10.0 cm1 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : >10 cm0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : Palpable firmness only10 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 0 - 2.4 cm2 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 2.5 - 5.0 cm2 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 5.1 - 10.0 cm0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Moderate12 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Severe0 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherItching20 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Mild35 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Moderate3 participants
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Mild17 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 0 - 2.4 cm2 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Mild18 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : Palpable firmness only9 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Severe0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Severe1 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 5.1 - 10.0 cm0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherItching15 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 2.5 - 5.0 cm2 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : 0 - 2.4 cm9 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 5.1 - 10.0 cm0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherSwelling : 2.5 - 5.0 cm0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherRedness : >10 cm0 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Moderate2 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherPain: Mild34 participants
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Injection Site Reactions in the MotherTenderness: Moderate13 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherRedness : 2.5 - 5.0 cm0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherRedness : 5.1 - 10.0 cm0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherSwelling : 2.5 - 5.0 cm0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherPain: Severe0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherSwelling : 5.1 - 10.0 cm0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherTenderness: Moderate10 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherSwelling : 0 - 2.4 cm2 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherTenderness: Severe0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherItching14 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherPain: Mild24 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherRedness : 0 - 2.4 cm5 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherTenderness: Mild16 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherRedness : >10 cm0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherPain: Moderate0 participants
Group 4: Single Dose (Infant Participants)Injection Site Reactions in the MotherSwelling : Palpable firmness only6 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherSwelling : 2.5 - 5.0 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherPain: Mild3 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherSwelling : 0 - 2.4 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherSwelling : Palpable firmness only1 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherRedness : 2.5 - 5.0 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherRedness : 5.1 - 10.0 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherRedness : >10 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherSwelling : 5.1 - 10.0 cm0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherTenderness: Mild3 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherTenderness: Severe0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherPain: Moderate0 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherItching4 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherRedness : 0 - 2.4 cm5 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherTenderness: Moderate1 participants
Group 5: Placebo (Infant Participants)Injection Site Reactions in the MotherPain: Severe0 participants
Secondary

Length of the Baby

Length of the baby

Time frame: Delivery

Population: Baby safety analysis set

ArmMeasureValue (MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Length of the Baby50.3 centimetersStandard Deviation 3.59
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Length of the Baby49.9 centimetersStandard Deviation 2.96
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Length of the Baby49.3 centimetersStandard Deviation 4.88
Group 4: Single Dose (Infant Participants)Length of the Baby48.9 centimetersStandard Deviation 4.42
Group 5: Placebo (Infant Participants)Length of the Baby49.7 centimetersStandard Deviation 4.45
Secondary

Weight of the Baby

Weight of the baby

Time frame: Delivery

Population: Baby safety analysis set

ArmMeasureValue (MEAN)Dispersion
Group 1: 4 Week Dose Interval; 2 Doses (Infant Participants)Weight of the Baby3165.4 gramsStandard Deviation 585.45
Group 2: Early Intervention; 4 Week Dose Interval; 2 Doses (Infant Participants)Weight of the Baby3086.5 gramsStandard Deviation 679.5
Group 3: Early Intervention; 8 Week Dose Interval; 2 Doses (Infant Participants)Weight of the Baby3230.1 gramsStandard Deviation 638.71
Group 4: Single Dose (Infant Participants)Weight of the Baby2955.3 gramsStandard Deviation 598.35
Group 5: Placebo (Infant Participants)Weight of the Baby3272.4 gramsStandard Deviation 629.2

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026