ATHWAL, A.; CHAKRAVORTY, R.; SUR, D.; SAHA, R. Use of letrozole versus clomiphene citrate combined with gonadotropins for ovulation induction in infertile women with polycystic ovary syndrome: a pilot study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 6, n. 9, p. 4098–4101, 2017. DOI: 10.18203/2320-1770.ijrcog20174068. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/3371. Acesso em: 2 oct. 2025.