TIWARI, K.; KHANAM, I.; SAVARNA, N. A study on effectiveness of lactational amenorrhea as a method of contraception. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 10, p. 3946–3950, 2018. DOI: 10.18203/2320-1770.ijrcog20183837. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/5512. Acesso em: 8 nov. 2025.