RecruitingNot Applicable

Impact of Serum Progesterone Levels on Embryo Transfer Day on Clinical Pregnancy

China370 participantsStarted 2026-01-20

Plain-language summary

Hypotheses: We hypothesize that serum progesterone levels on the day of embryo transfer in HRT-FET cycles are positively associated with clinical pregnancy rates. Aims: To evaluate the relationship between serum progesterone levels on embryo transfer day and clinical pregnancy outcomes in frozen-thawed embryo transfer cycles using hormone replacement therapy (HRT). Primary outcome: To compare the incidence of clinical pregnancy outcome in those infertility patients undergoing frozen embryo transfer with caterized Progesterone level on the day of embryo transfer Secondary outcomes: Biochemical pregnancy rate. Implantation rate. Early pregnancy loss rate. Ectopic pregnancy rate.

Who can participate

Age range

18 Years – 42 Years

Sex

FEMALE

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion Criteria: * Patients undergoing FET cycles * Infertility patients aged \>18 years old and \< 42 years old * BMI \< 30 kg/m2 * Transfer of at least one good-quality embryo. Exclusion Criteria: * Severe endocrine disorders (e.g., thyroid dysfunction, premature ovarian failure). * Severe uterine factors without treatment (severe endometriosis, extensive or subendometrial fibroid, uterine adherent, endometrial polyps)

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Clinical pregnancy rate (CPR)

Timeframe: 6 weeks of gestation and ultrasound scanning will be performed to confirm at least one gestational sac around 1 to 3 months after FET

Trial details

NCT IDNCT07388797

SponsorChinese University of Hong Kong

Sponsor typeOTHER

Study typeOBSERVATIONAL

Primary completion2028-06-30

View on ClinicalTrials.gov More Reproductive Issues trials