The study is conducted to confirm equivalence between QL1012 (a new biosimilar formulation of Recombinant Human Follicle-stimulating Hormone) and Gonal-f® with respect to the number of oocytes retrieved in women for assisted reproductive treatment.

Inclusion Criteria:

1. Signed informed consent
2. Aged 20 ~ 39 years(inclusive)
3. Body mass index (BMI) between 18~30 kg/m2(inclusive)
4. Regular menstrual cycle (25~35 days)
5. Basal FSH < 10 IU/L (menstrual cycle day 2~5)

Exclusion Criteria:

1. History of ≥3 previously completed IVF/ICSI-ET cycles without clinical pregnancy
2. History of ≥3 recurrent spontaneous miscarriages
3. Patients with high risk of ovarian hyperstimulation syndrome (OHSS)
4. Primary ovarian failure or poor responders to ovarian stimulation
5. Presence of pregnancy in previous 3 months
6. Presence of clinically significant systemic disease, endocrine disease or metabolic abnormalities
7. History of malignant tumors of the ovary, breast, uterus, hypothalamus, pituitary gland, etc.;