Ahmad, K., U. Muzaffar, S. Bashir, and F. Jabeen. “Effects of Letrozole Alone or Letrozole in Combination With Low-Dose Intramuscular Injection of Human Menopausal Gonadotropin on Ovulation and Pregnancy of 150 Patients With Polycystic Ovary Syndrome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 10, no. 1, Dec. 2020, pp. 164-72, doi:10.18203/2320-1770.ijrcog20205763.