ArticleCurrent medical science2019
Flexible GnRH Antagonist Protocol versus Progestin-primed Ovarian Stimulation (PPOS) Protocol in Patients with Polycystic Ovary Syndrome: Comparison of Clinical Outcomes and Ovarian Response.
Article in Current medical science, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06637189 (Protocol with Progestin-primed Ovarian Stimulation), which is not on this map. Cited by 25 papers, 4 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Protocol with Progestin-primed Ovarian Stimulation (PPOS) from the Beginning of Stimulation Versus Protocol with GnRH Antagonists for Ovarian Stimulation in Patients Undergoing DUOSTIM with Embryo Accumulation for PGT-A.
Who cites it
25 citing papers in PubMed, 4 syntheses or guidelines pooled it, 47 citations in OpenAlex.
- A comparison of the effects of progestin-primed ovarian stimulation protocol and gonadotropin-releasing hormone antagonist protocol in assisted reproductive technology: a systematic review and meta-analysis.Journal of assisted reproduction and genetics · 2025Pooled it
- Controlled ovarian stimulation protocols for assisted reproduction: a network meta-analysis.The Cochrane database of systematic reviews · 2025Pooled it
- GnRH antagonist protocol versus progestin-primed ovarian stimulation in patients with polycystic ovary syndrome: a systematic review and meta-analysis.Archives of gynecology and obstetrics · 2024Pooled it
- Efficacy of progestin-primed ovarian stimulation in women with polycystic ovary syndrome undergoingFrontiers in endocrinology · 2023Pooled it
- Delayed initiation of GnRH antagonist in PCOS patients undergoing IVF: a retrospective cohort study of premature ovulation and embryological outcomes.Journal of ovarian research · 2026Article
- IVF Outcomes After PPOS Versus Flexible GnRH-Antagonist Protocol in Advanced-Age Women With Diminished Ovarian Reserve: A Retrospective Study.Health science reports · 2026Article
- Progestin primed ovarian stimulation yields comparable outcomes to the GnRH antagonist protocol for controlled ovarian hyperstimulation.Scientific reports · 2025Article
- Etonogestrel implant for LH suppression in a novel DuoStim ovarian stimulation protocol using overlapping doses of corifollitropin alfa for social egg freezing: a case report.JBRA assisted reproduction · 2025Article
- Progestin-primed ovarian stimulation protocol in patients undergoing assisted reproductive technology.Frontiers in reproductive health · 2025Review
- Unlocking Success: The Optimal Gonadotrophin Starting Point for Luteal-Phase Stimulation in IVF Patients with Normal Responses.International journal of women's health · 2025Article
- Progestin-primed ovarian stimulation with letrozole using different doses of medroxyprogesterone acetate per day: a retrospective cohort study.Frontiers in endocrinology · 2024Article
- Women with PCOS who undergo IVF: a comprehensive review of therapeutic strategies for successful outcomes.Reproductive biology and endocrinology : RB&E · 2023Review
- Comparison of cumulative live birth rates between progestin-primed ovarian stimulation protocol and gonadotropin-releasing hormone antagonist protocol in different populations.Frontiers in endocrinology · 2023Article
- Article
- Comparison of the neonatal outcomes of progestin-primed ovarian stimulation and flexible GnRH antagonist protocols: a propensity score-matched cohort study.Frontiers in endocrinology · 2023Article
- Is early-follicular long-acting GnRH agonist protocol an alternative for patients with polycystic ovary syndrome undergoing in vitro fertilization?Reproductive biology and endocrinology : RB&E · 2022Article
- Potential biomarkers for clinical outcomes of IVF cycles in women with/without PCOS: Searching with metabolomics.Frontiers in endocrinology · 2022Article
- Follicular-Phase GnRH Agonist Protocol Is Another Choice for Polycystic Ovary Syndrome Patients With Lower LH/FSH and Lower AMH Levels Without Increasing Severe OHSS Risk.Frontiers in endocrinology · 2022Article
- The efficacy of dydrogesterone use to suppress premature luteinizing hormone surge on cycle outcomes in controlled ovarian stimulationJournal of the Turkish German Gynecological Association · 2021Article
- Progestin primed ovarian stimulation using corifollitropin alfa in PCOS women effectively prevents LH surge and reduces injection burden compared to GnRH antagonist protocol.Scientific reports · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Polycystic ovary syndrome (PCOS) is one of the most common causes of infertility in women. Progestin-primed ovarian stimulation (PPOS) protocol, which used oral progestin to prevent premature luteinizing hormone (LH) surges in ovarian stimulation, has been proved to be effective and safe in patients with PCOS. The aim of the present study was to compare the efficacy of PPOS protocol with that of the traditional gonadotropin-releasing hormone (GnRH) antagonist protocol in patients with PCOS. A total of 157 patients undergoing in-vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI) were recruited into this study. The patients were divided into two groups by the stimulation protocols: the GnRH antagonist protocol group and the PPOS protocol group. There was no significant difference in the clinical characteristics between the two groups. Dose and duration of gonadotropin were higher in the PPOS protocol group. Estradiol levels on the day of human chorionic gonadotropin (hCG) administration were significantly lower in the PPOS protocol group. Fertilization rates and the number of good quality embryos were similar between the two groups. Remarkably, we found 6 patients with moderate ovarian hyperstimulation syndrome (OHSS) in the GnRH antagonist protocol group but 0 in the PPOS protocol group. A total of 127 women completed their frozen embryo transfer (FET) cycles. There were no significant differences between the two groups in terms of clinical pregnancy rate per transfer, implantation rate, first-trimester miscarriage rate and on-going pregnancy rate per transfer. To conclude, PPOS protocol decreased the incidence of OHSS without adversely affecting clinical outcomes in patients with PCOS.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.