Effects of the Zishen Yutai Pill on live births compared with placebo among infertile women with frozen-thawed embryo transfer cycle: A multicentre double-blind randomized controlled trial

Zishen Yutai Pill exhibited clinical benefit to infertile women undergoing fresh embryo transfer cycles, improving their pregnancy outcomes. However, as the endometrial environment in frozen embryo transfer (FET) is different from fresh cycles, the effects of ZYP on fresh embryo transfer could not be generalized to FET.