Shafiq, Amna, et al. “COMPARISON OF OVULATION INDUCTION LETROZOLE AND CLOMIPHENE CITRATE IN SUBFERTILE WOMEN WITH POLYCYSTIC OVARIAN SYNDROME: Ovulation Induction Letrozole and Clomiphene Citrate”. Pakistan Armed Forces Medical Journal, vol. 71, no. 5, Oct. 2021, pp. 1844-47, https://doi.org/10.51253/pafmj.v71i5.6554.