SynthesisFrontiers in endocrinology2021
Preparation of the Endometrium for Frozen Embryo Transfer: A Systematic Review.
Synthesis in Frontiers in endocrinology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 61 papers, 2 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.
Hormonal Replacement Therapy Plus Letrozole Incorporation Versus Letrozole Mild Ovarian Stimulation in Endometrial Preparation for Frozen Embryo Transfer: A Randomised Controlled Trial
The Effectiveness of the Two Different Endometrial Preparation Regimes for Frozen Embryo Transfer in Patients With Adenomyosis
Who cites it
61 citing papers in PubMed, 2 syntheses or guidelines pooled it, 115 citations in OpenAlex.
- Effects of acupuncture-related therapies on pregnancy outcomes among women undergoing in vitro fertilization and embryo transfer: a Bayesian network meta-analysis.Journal of assisted reproduction and genetics · 2025Pooled it
- Systematic review update and meta-analysis of randomized and non-randomized controlled trials of ovarian stimulation versus artificial cycle for endometrial preparation prior to frozen embryo transfer in women with polycystic ovary syndrome.Reproductive biology and endocrinology : RB&E · 2022Pooled it
- Effects of vaginal vs oral progesterone supplementation before embryo transfer on live birth rates and levels: a randomized trial.Reproduction & fertility · 2025Trial
- Association between duration of progesterone supplementation and clinical outcomes in artificial frozen-thawed embryo transfer cycles.Frontiers in endocrinology · 2023Trial
- Optimizing the Endometrial Factor in Recurrent Implantation Failure: From Established Diagnostics to Mechanism-Informed Management.Journal of clinical medicine · 2026Review
- Double stimulation in the same menstrual cycle (DuoStim): a comparative evaluation of follicular and luteal phase response.Journal of the Turkish German Gynecological Association · 2026Article
- Progesterone Levels on the Day of Frozen-thawed Embryo Transfer in Artificial Cycles with Vaginal Progesterone Do not Predict Clinical Pregnancy: a Prospective Study.Reproductive sciences (Thousand Oaks, Calif.) · 2026Article
- Contemporary Approaches Towards the Optimization of Embryo Implantation.Journal of clinical medicine · 2026Review
- Article
- Treatment management algorithm for natural frozen embryo transfer cycles using a real-time ovulation prediction machine learning model.Scientific reports · 2026Article
- Article
- Progesterone levels on the day of the β-hCG test predict pregnancy outcomes in FET cycles.Scientific reports · 2026Article
- Serum progesterone and vaginal gel dose in artificial-cycle frozen embryo transfer: association with pregnancy outcome.Frontiers in endocrinology · 2026Article
- Live Births Following IVF-FET in Two Adult Sisters with Nonclassic P450 Oxidoreductase Deficiency: A Case Report Identifying a Novel POR Variant.International journal of women's health · 2026Article
- Effect of progesterone timing on live birth rates in day-6 blastocyst frozen-thawed embryo transfer cycles: a randomized controlled trial.Human reproduction open · 2026Article
- High level of estrogen on the day before embryo transfer is associated with reduced live birth after frozen embryo transfer: a retrospective cohort study from 14565 cycles.Frontiers in endocrinology · 2026Article
- Advanced maternal age as a risk factor for endometrial receptivity in repeated implantation failure: intersectional transcriptomic analysis and gene validation.Frontiers in cell and developmental biology · 2026Article
- Comparison of frozen embryo transfer outcomes in hormonal vs. mild stimulation protocols in polycystic ovary syndrome women: A randomized controlled trial.International journal of reproductive biomedicine · 2025Article
- Progestins - a review of clinical application in gynecology.Annals of medicine · 2025Review
- Impact of serum luteinizing hormone level and increment on the day of endometrial transformation on frozen-thawed single blastocyst transfer outcome in the hormone replacement cycle.Journal of ovarian research · 2025Article
1 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Despite the worldwide increase in frozen embryo transfer, the search for the best protocol to prime endometrium continues. Well-designed trials comparing various frozen embryo transfer protocols in terms of live birth rates, maternal, obstetric and neonatal outcome are urgently required. Currently, low-quality evidence indicates that, natural cycle, either true natural cycle or modified natural cycle, is superior to hormone replacement treatment protocol. Regarding warmed blastocyst transfer and frozen embryo transfer timing, the evidence suggests the 6
Indexed as
Identifiers
What OpenQuestion holds
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.