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Clomiphene vs Progesterone in Ovarian Stimulation in Patients with Low Ovarian Response

Clomiphene versus Progesterone in an Ovarian Stimulation Protocol in Patients with Poor Ovarian Response: An Open-Label Randomized Clinical Trial

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
REBEC
Registry ID
RBR-578rqds
Enrollment
Unknown
Registered
2025-11-17
Start date
2025-11-21
Completion date
Unknown
Last updated
2025-12-08

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

Conditions

Diminished Ovarian Reserve

Interventions

This is an open label randomized non inferiority clinical trial with parallel allocation of two hundred participants being one hundred participants in the experimental group and one hundred participan
Patient-Oriented Strategies Encompassing Individualized Oocyte Number&quot
group three and four generated by an independent statistician The study is open label that is without masking for participants and researchers Experimental group Progesterone participants will receive

Sponsors

Hospital de Clínicas de Porto Alegre
Lead Sponsor
Clínica Proser
Collaborator

Eligibility

Sex/Gender
Female
Age
18 Years to 45 Years

Inclusion criteria

Inclusion criteria: Age between 18-45 years; Female gender; Patients undergoing their first PPOS protocol who meet the criteria for POSEIDON group 3 (women <35 years old with low ovarian reserve, AFC<5) or POSEIDON group 4 (women =35 years old with low ovarian reserve, AFC<5); Indication for in vitro fertilization or intracytoplasmic sperm injection; Signed informed consent

Exclusion criteria

Exclusion criteria: Chromosomal abnormalities in either partner; Oocyte cryopreservation, oocyte or sperm donation; Endometrioma (= 3 cm on imaging); Combined transfer of embryos from different stimulation cycles; Contraindication to the use of progesterone or clomiphene

Design outcomes

Primary

MeasureTime frame
To compare the ovulation inhibition rate in cycles with Clomiphene versus Progesterone; verified by comparing the proportions of premature LH surge blockade between the groups; the outcome will be measured by confirming that the inhibition rate in the Clomiphene group is not inferior by more than 7% to the Progesterone group

Secondary

MeasureTime frame
To compare the cumulative live birth rate per follicular aspiration cycle; verified by monitoring patients and their records for 24 months; The live birth rate will be compared between the Progesterone and Clomiphene groups ;To compare the number of oocytes retrieved; verified by counting oocytes after follicular aspiration in the laboratory; The mean number of oocytes will be compared between the groups;To assess the oocyte maturation rate; verified by counting mature oocytes (MII) in the embryology laboratory; The MII oocyte rate will be compared between the groups;To compare the number of embryos available for cryopreservation; verified by counting viable embryos that reached the appropriate stage in the laboratory; The mean number of embryos will be compared between the groups

Countries

Brazil

Contacts

Public ContactRicardo Savaris

Hospital de Clínicas de Porto Alegre

rsavaris@hcpa.edu.br+55(51)3359-6042

Outcome results

None listed

Source: REBEC (via WHO ICTRP)