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An Exploratory Study to Investigate the Effect of FE 999302 When Given Together With Follitropin Delta During Controlled Ovarian Stimulation

A Randomised, Partially Double-blind, Placebo-controlled, Parallel-group Exploratory Trial to Investigate the Effect of FE999302 in Women Undergoing Controlled Ovarian Stimulation With a Fixed Dose of Follitropin Delta in a Gonadotropin-releasing Hormone Antagonist Protocol

Status
Terminated
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06466486
Acronym
Celestial-1
Enrollment
310
Registered
2024-06-20
Start date
2024-06-14
Completion date
2025-12-03
Last updated
2026-03-30

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

Conditions

Fertility

Brief summary

This is a phase 1b clinical trial with Choriogonadotropin beta (FE999302) and Follitropin delta (Rekovelle). The trial is multicentre, randomized, partially double-blind, placebo-controlled, parallel-group investigating the effect of FE999302 on parameters influencing pregnancy rates in women undergoing controlled ovarian stimulation with a fixed dose of follitropin. The primary endpoint is the number of good-quality blastocysts on day 5 after oocyte retrieval. Secondary endpoints are number of follicles by size category and serum concentration of different hormones on stimulation day 6 and end-of stimulation, the number of stimulation days and oocytes retrieved, the number of metaphase II oocytes and fertilised oocytes, number of blastocysts on day 5, number of cryopreserved blastocysts, endometrial thickness at eos, positive bhcg rate, clinical pregnancy, vital pregnancy and ongoing pregnancy.

Interventions

The effect on parameters influencing pregnancy rates in women undergoing controlled ovarian stimulation with a fixed dose of follitropin.

DRUGFE999302

To investigate the effect of FE 999302 on parameters influencing pregnancy rates in women undergoing controlled ovarian stimulation with a fixed dose of follitropin delta in a gonadotropin-releasing hormone (GnRH) antagonist protocol

DRUGFE999302 Placebo

To investigate the effect of FE 999302 on parameters influencing pregnancy rates in women undergoing controlled ovarian stimulation with a fixed dose of follitropin delta in a gonadotropin-releasing hormone (GnRH) antagonist protocol

Sponsors

Ferring Pharmaceuticals
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 40 Years
Healthy volunteers
Yes

Inclusion criteria

1. Subject informed consent form signed before any trial-related activities. 2. In good physical and mental health as judged by the investigator. 3. Serum anti-Müllerian hormone (AMH) levels of 15.0-35.0 pmol/L at screening (measured at central laboratory). 4. Pre-menopausal women between the ages of 18 and 40 years. The subjects must be at least 18 years (including the 18th birthday) and no more than 40 years (up to the day before the 41st birthday) when they sign the informed consent(s). 5. Infertile women diagnosed with tubal infertility, unexplained infertility, endometriosis stage I/II or with partners diagnosed with male factor infertility, eligible for in vitro fertilisation (IVF) and/or intracytoplasmic sperm injection (ICSI) using fresh or frozen ejaculated sperm from male partner or sperm donor. 6. Infertility for at least 1 year before screening for subjects \<35 years or for at least 6 months for subjects ≥35 years (not applicable in case of tubal or severe male factor infertility). 7. No more than two controlled ovarian stimulation cycles initiated, regardless of outcome (taking

Exclusion criteria

2 and 3 into account) and the subject must be suitable for treatment with 10 or 15 µg/day follitropin delta (corresponding to 150 or 225 IU). 8. Regular menstrual cycles of 24-35 days (both inclusive), presumed to be ovulatory. 9. Early follicular phase (cycle day 2-5) serum levels of follicle-stimulating hormone (FSH) between 1 and 15 IU/L (measured at central laboratory). 10. Body mass index (BMI) between 18.0 and 30.0 kg/m2 (both inclusive) at screening.

Design outcomes

Primary

MeasureTime frameDescription
Number of good-quality blastocystsDay 5 after oocyte retrieval.The number of good-quality blastocysts

Secondary

MeasureTime frameDescription
Number and size of folliclesOn stimulation day 6 and up to 20 daysNumber of follicles by size category
Serum hormone concentrationsOn stimulation day 6, and up to 20 daysSerum hormone concentrations of progesterone, 17-OH-progesterone, androstenedione, testosterone, estradiol, inhibin B, and luteinising hormone (LH) on stimulation day 6 and at end of stimulation.
Number of Stimulation daysUp to 20 daysNumber of stimulation days
Number of oocytesUp to 22 daysNumber of oocytes retrieved
Number of metaphase II oocytesUp to 22 daysNumber of metaphase II (MII) oocytes
Number of fertilised oocytesUp to 22 daysNumber of fertilised (2 pronuclei \[2PN\]) oocytes
Number of blastocystsUp to 27 daysNumber of blastocysts
Number of cryopreserved blastocystsUp to 28 daysNumber of cryopreserved blastocysts
Endometrial thicknessUp to 20 days, and up to 27 daysEndometrial thickness
Positive βhCG13 to 15 days after fresh transferPositive βhCG (positive serum βhCG test )
Clinical pregnancy5-6 weeks after fresh transferClinical pregnancy (at least one gestational sac)
Vital pregnancy5-6 weeks after fresh transferVital pregnancy (at least one intrauterine gestational sac with fetal heart beat)
Ongoing pregnancy10-11 weeks after fresh transferOngoing pregnancy (at least one intrauterine viable fetus)

Countries

Belgium, Czechia, Denmark, Norway, Spain

Contacts

STUDY_DIRECTORGlobal Clinical Compliance

Ferring Pharmaceuticals

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 31, 2026