NAZNEEN, S.; KANDASAMY, V.; SHINDE, R. V. A comparative study of spontaneously conceived twin pregnancies vs. twins conceived by assisted reproductive techniques and their maternal and perinatal outcomes: a prospective observational study. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 13, n. 10, p. 2770–2775, 2024. DOI: 10.18203/2320-1770.ijrcog20242809. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/14516. Acesso em: 14 oct. 2025.