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Vitamin D3 Supplementation Regimens and Preeclampsia Risk

Effect of Different Dosages of Vitamin D3 Supplementation on the Risk of Preeclampsia in Pregnant Women With Vitamin D Deficiency

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07648706
Acronym
VitD-PE-RCT
Enrollment
268
Registered
2026-06-15
Start date
2024-08-04
Completion date
2026-09-01
Last updated
2026-06-15

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

Conditions

Preeclampsia

Brief summary

This study is a randomized controlled trial with two parallel groups connected at Al-Thawra Modern General Hospital in Sana'a, Yemen. It aims to compara the effect of two different vitamin D3 supplementation regimens during pregnancy on the risk of pre-eclampsia among women with confirmed vitamin D deficiency. Pregnant women attending antenatal care and diagnosed with vitamin D deficiency will be screened for eligibility. Eligible participants will be randomly assigned to one of two intervention groups:one group receiving vitamin D3 50,000 IU every two weeks and the other group receiving vitamin D3 5,000 IU weekly,in addition to standard antenatal care. The study will include singleton pregnancies between 8\_18 weeks of gestation with serum 25-hydroxyvitamin D level below 25 ng /mL . Women with chronic conditions that may affect pregnancy outcomes or vitamin D metabolism will be excluded. Participants will be followed throughout pregnancy to assess the development of pre-eclampsia and other maternal and fetal outcomes.

Detailed description

Vitamin D deficiency during pregnancy has been associated with advers maternal and neonatal outcomes, including an increased risk of preeclampsia.However,the optimal dosage regimen of vitamin D3 supplementation in deficient pregnant women remains uncertain. This randomized controlled trial will be conducted at Al-Thawra Modern General Hospital in Sana'a, Yemen, and will include pregnant women with confirmed vitamin D deficiency in early pregnancy. Participants will be randomly assigned to one of two vitamin D3 supplementation regimens and followed throughout pregnancy. The study aims to compare the effectiveness of two different vitamin D3 dosing scheduales in reducing the incidence of preeclampsia.Maternal vitamin D status and pregnancy outcomes will be assessed as secondary measures to evaluate the overall impact of supplementation.

Interventions

DIETARY_SUPPLEMENTVitamin D3

Arm 1: Oral vitamin D3 supplementation administered during pregnancy. Participants will receive : 50,000 IU every two weeks according to their randomized group assignment.

Sponsors

Sana'a University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
PREVENTION
Masking
NONE

Masking description

No additional masking beyond those specified.

Intervention model description

Participants will be randomly assigned in a 1:1 ratio to one of two parallel intervention arms .Each arm will recive a different vitamin D3 supplementation regimen during pregnancy .Participants will remain in their assigned group throughout the study period until completion of follow-up Arm 1: Name: Vitamin D3 50,000 IU every 2 weeks Type: Experimental Intervention: Vitamin D3 Arm 2: Name: Vitamin D3 5,000 IU weekly Type: Experimental Intervention: Vitamin D3

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
No

Inclusion criteria

* Singleton pregnancy * Pregnant women between 8 and 18 weeks of gestation * Serum 25-hydroxyvitamin D \[25(OH)D\] level \< 25 ng/mL * Willing and able to provide written informed consent * Planning to receive ongoing antenatal care and deliver at Al-Thawra Modern General Hospital.

Exclusion criteria

* Uncontrolled chronic hypertension * Current use of vitamin D supplementation before enrollment * Severe chronic kidney disease * Pre-existing diabetes mellitus * Autoimmune or immunological disorders * Known fetal congenital anomalies * Primary hyperparathyroidism * Thyroid disease * Use of medications that affect vitamin D or calcium metabolism * Inability or unwillingness to comply with the study protocol or follow-up schedule

Design outcomes

Primary

MeasureTime frameDescription
Incidence of Pre-eclampsia eventsFrom 20 weeks of gestation until deliveryOccurance of preeclampsia during pregnancy , diagnosed according standared clinical criteria including new onset hypertention after 20weeks of gestation with proteinuria or other feature of maternal organ dysfunction.

Secondary

MeasureTime frameDescription
Severity of PreeclampsiaAt diagnosis of preeclampsia until deliveryDescription Severity of preeclampsia assessed by the need for preterm delivery, maternal intensive care unit admission, or other severe maternal complications.
Gestational Age at Onset of PreeclampsiaAt first diagnosis of preeclampsiaGestational age in weeks at the time of first diagnosis of preeclampsia.
Occurrence of Severe Maternal ComplicationsFrom enrollment until deliveryOccurrence of HELLP syndrome, eclampsia, or placental abruption during pregnancy
Incidence of Gestational Diabetes MellitusFrom enrollment until delivery]Occurrence of gestational diabetes diagnosed according to standard clinical criteria.
Incidence of Gestational HypertensionFrom enrollment until deliveryOccurrence of gestational hypertension diagnosed according to standard clinical criteria.
Maternal MortalityFrom enrollment until 42 days postpartumDeath of a participant during pregnancy or within 42 days after termination of pregnancy.
Incidence of Low Birth WeightAt birthProportion of newborns with birth weight less than 2500 grams.
Incidence of Preterm BirthAt deliveryDelivery occurring before 37 completed weeks of gestation.
Neonatal Intensive Care AdmissionAt birthAdmission of the newborn to a neonatal intensive care unit.
Mean Birth WeightAt birthBirth weight of newborns measured in grams.
Neonatal MortalityFrom birth to 28 days of lifeDeath of a live-born infant during the neonatal period.

Countries

Yemen

Contacts

CONTACTAmany Omer Taib, MBBS
a.taib@su.edu.ye+967775851225
PRINCIPAL_INVESTIGATORAmany Omer Taib, MBBS

Faculty of Medicine and Health Sciences, Sana'a University

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 16, 2026