BACKGROUND: Different endometrial preparation protocols are used prior to frozen-thawed embryo transfer (FET). Optimization of endometrial preparation protocols is mandatory to improve live birth rate and obstetric and perinatal outcomes. I…
RESEARCH QUESTION: Does preimplantation genetic testing for aneuploidy (PGT-A) on cryopreserved unbiopsied blastocysts improve pregnancy outcomes for women with previous IVF-related pregnancy loss? METHODS: This retrospective observational…
Advanced maternal age (AMA, ≥35 years) women undergoing assisted reproductive technology (ART) face reduced live birth rates (LBR) and remain a major clinical challenge. In a large randomized trial, Zishen Yutai Pill (ZYP) improved LBR in t…
BACKGROUND: Late follicular phase progesterone elevation (LFPE) during ovarian stimulation is associated with reduced live birth rates (LBRs) after cleavage-stage embryo transfer. However, due to better synchronization with a stimulated end…
OBJECTIVE: To assess the efficacy of the Zishen Yutai Pill compared with placebo on live birth rates among women after fresh embryo transfer cycles. METHODS: We conducted a double-blind, multicenter, placebo-controlled, randomized trial to…
BACKGROUND: A number of studies have compared the clinical outcomes between the two endometrial preparation methods: natural cycles (NCs) and hormone replacement treatment (HRT) before frozen embryo transfer, but the results were conflictin…
BACKGROUND: The ideal protocols of endometrial preparation for polycystic ovary syndrome (PCOS) patients are lacking and need further declaration. Our objective was to compare the clinical outcomes of frozen-thawed embryo transfer (FET) wit…
PURPOSE: To compare the clinical outcome of fresh embryo transfer with frozen-thawed embryo transfer in subsequent cycle of GnRH antagonist protocol. METHODS: Totally, 1430 women were enrolled from the cases of our Assisted Reproduction Ce…
It is unknown whether seasonal variation influences the outcome of in vitro fertilization (IVF). Previous studies related to seasonal variation of IVF were all small sample size, and the results were conflicting. We performed a retrospectiv…