JAIN, S.; DAHIYA, P.; YADAV, J.; JAIN, N. A comparative study of efficacy of letrozole and clomiphene citrate for ovulation induction. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 10, p. 4133–4138, 2018. DOI: 10.18203/2320-1770.ijrcog20184141. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/5404. Acesso em: 2 oct. 2025.