Which IVF protocol works best for PCOS? new trial aims to find out
NCT ID NCT07394530
First seen Jun 24, 2026 · Last updated Aug 06, 2026 · Updated 3 times
Summary
This study compares two common ovarian stimulation protocols used during IVF in women with polycystic ovary syndrome (PCOS). The PPOS protocol uses a progestin hormone to suppress ovulation, while the antagonist protocol uses a different drug. Researchers will track which method leads to more ongoing pregnancies at 12 weeks. The trial plans to enroll 400 women aged 18–40 with PCOS who are undergoing IVF.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Progestin (PPOS) and GnRH antagonist (for ovarian stimulation during IVF)
- What this could lead to
- If one protocol proves better, it could improve pregnancy success rates for women with PCOS undergoing IVF.
- What could go wrong
- This is a single-center study in Vietnam, so results may not apply to all populations. The trial is not blinded, which could introduce bias.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 400 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jan 2026
- Expected to finish
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Jun 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 40 years
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Women aged 18-40 years * Diagnosed with polycystic ovary syndrome (PCOS) according to the modified Rotterdam criteria (2004) (≥2 of 3: oligo/anovulation, hyperandrogenism, or polycystic ovarian morphology on ultrasound) * Indicated for in vitro fertilization (IVF) due to PCOS alone or PCOS with other infertility factors (e.g., tubal factor, previous failed IUI) * Eligible for controlled ovarian stimulation for IVF * Husband/partner with normal sperm parameters or mild to moderate oligoasthenoteratozoospermia (OAT) * Willing and able to provide written informed consent and comply with study procedures. Exclusion Criteria: * Uterine abnormalities that may impair implantation or pregnancy outcomes, including congenital uterine malformations, large fibroids distorting the uterine cavity, adenomyosis, or severe intrauterine pathology. * History of major ovarian or uterine surgery affecting ovarian reserve or uterine structure (e.g., ovarian cystectomy, endometriosis surgery, myomectomy, unilateral oophorectomy) * History of recurrent pregnancy loss (≥3 spontaneous miscarriages) * Known chromosomal abnormalities in either partner * Inability to adhere to study protocol or follow-up procedures
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Hanoi General Hospital
RECRUITINGHanoi, Hanoi, 10000, Vietnam
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- Can a daily supplement boost fertility? a new trial investigates
- A Hormone's hidden power: could progesterone be the key to unexplained infertility?
- Could a pancreatic peptide hold clues to PCOS-Related insulin resistance?
- PCOS may fuel fatty liver in teens even after accounting for obesity — a study investigates