Inclusion Criteria:  Signed informed consent Aged 20 ~ 39 years(inclusive) Body mass index (BMI) between 18~30 kg/m2(inclusive) Regular menstrual cycle (25~35 days) Basal FSH < 10 IU/L (menstrual cycle day 2~5)  Exclusion Criteria:  History of ≥3 previously completed IVF/ICSI-ET cycles without clinical pregnancy History of ≥3 recurrent spontaneous miscarriages Patients with high risk of ovarian hyperstimulation syndrome (OHSS) Primary ovarian failure or poor responders to ovarian stimulation Presence of pregnancy in previous 3 months Presence of clinically significant systemic disease, endocrine disease or metabolic abnormalities History of malignant tumors of the ovary, breast, uterus, hypothalamus, pituitary gland, etc.;