1,266
Participants
Start Date
June 30, 2016
Primary Completion Date
December 31, 2022
Study Completion Date
December 31, 2024
GnRH-a
In experimental group, patients use long term GnRH-a; Patients' serum or follicle fluid will be collected if needed.
GnRH-anta
In control group, patients use GnRH-antagonist. Patients' serum or follicle fluid will be collected if needed.
Reproductive Medical Center, 1st Affiliated Hospital of Zhengzhou University, Zhengzhou
The First Affiliated Hospital of Zhengzhou University
OTHER