SENGODAN, S. S.; VELUMANI, S. Amniotic fluid optical density at spontaneous onset of labour and it’s correlation with gestational age, birth weight and functional maturity of newborn. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 9, n. 12, p. 5060–5064, 2020. DOI: 10.18203/2320-1770.ijrcog20205247. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/9278. Acesso em: 13 oct. 2025.