This will be a multi-center double-blind randomized controlled trial, which aims to explore the application of Zishen Yutai Pill in controlled ovarian stimulation and effect on pregnancy outcome in aged women undergoing in vitro fertilization-embryo transfer.The target population will be infertile women aged between 35 and 42 years, BMI<28kg/m2 and bilateral ovaries who undergo IVF-ET (long or antagonist protocol). Qualified 1,466 patients are randomized into either of two groups.They will be randomized to receive either Zishen Yutai Pill or the placebo. The pregnancy test results and pregnancy complications will be followed up by checking medical records and telephone calls.
To explore the application of Zishen Yutai Pill in controlled ovarian stimulation and effect on pregnancy outcome in aged women undergoing in vitro fertilization-embryo transfer.