Study on Early Intrauterine Transfer of Blank Culture Medium Before Frozen Embryo Transfer to Improve Pregnancy Outcomes in IVF

What this Trial Is About

This research aims to improve pregnancy success rates in women undergoing frozen embryo transfers FET after in vitro fertilization IVF. It evaluates whether placing a blank culture medium into the uterus a few days before the embryo transfer can enhance immune tolerance and support embryo implantation. The study compares this approach to a sham transfer procedure without the culture medium, focusing on women who have experienced previous embryo transfer failures. Participants are randomly assigned to one of two groups the experimental group receives a small amount of warmed embryo culture medium injected into the uterine cavity two to three days before the frozen embryo transfer, while the control group undergoes a sham transfer with an empty catheter during the same timeframe. The study is single-blind and involves multiple centers. During the trial, researchers will monitor pregnancy outcomes, including early pregnancy occurrence, biochemical and clinical pregnancy rates at various time points, early miscarriage rates, and live birth rates. They will also assess cost-effectiveness between the two care strategies. Participant involvement includes consent, membership in a health insurance plan, and follow-up evaluations up to and beyond the pregnancy period, with the primary outcome measured at 12 weeks of amenorrhea.

Advantages of Early Intrauterine Transfer of "Blank" Culture Medium Prior to 1st or 2nd Transfer of Thawed Embryo(s).