About this trial
This study aims to evaluate the clinical efficacy of transcriptome-based endometrial receptivity analysis (tb-ERA) and investigate the molecular mechanisms of abnormal receptivity in young women with unexplained recurrent implantation failure (RIF).
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
RIF Cohort - 1. Age ≤ 35 years; BMI 18-25 kg/m².
≥ 3 failed transfers of high-quality embryos.
No history of spontaneous or FET-related pregnancy, including biochemical pregnancy (primary infertility).
Written informed consent provided.
Disqualifiers
Known factors associated with RIF, including: uterine anatomical abnormalities (malformations, adhesions, polyps, submucosal fibroids, adenomyosis) and hydrosalpinx
Endocrine disorders (PCOS, thyroid dysfunction, hyperprolactinemia)
Reproductive immunological abnormalities, thrombophilia and infectious factors, abnormal semen parameters,
Chromosomal abnormalities in either partner (planned PGT-SR) or monogenic disease (planned PGT-M).
Trial population
This study will enroll women aged ≤ 35 years with a BMI of 18-25 kg/m². The RIF cohort includes patients with primary infertility and ≥ 3 failed transfers of high-quality embryos, further divided into the RIF-ERA group and the RIF non-ERA group (active comparator). The control group consists of patients undergoing their first IVF-ET cycle for tubal factor infertility, with no history of biochemical pregnancy or miscarriage. Patients with known causes of implantation failure will be excluded from all groups. All participants will provide written informed consent.
Trial design
Cohort
Prospective
Treatments tested in this trial
tb-ERA and personalized embryo transfer
Other interventiontb-ERA and personalized embryo transfer
Treatment groups
Trial outcomes
Primary outcomes
Ongoing pregnancy
Ongoing pregnancy is defined as viable pregnancy beyond 12 weeks' gestation.
Secondary outcomes
Clinical pregnancy
Pregnancy with ultrasound-confirmed intrauterine gestational sac(s)
Implantation rate
The proportion of gestational sacs observed divided by the total number of embryos transferred
Other outcomes
Endometrial Receptivity Signature
The proportion of young RIF patients diagnosed with a displaced Window of Implantation (either pre-receptive or post-receptive) based on Endometrial Receptivity Analysis (ERA)
Sponsors and contacts
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