CHHOLAK, D.; GUPTA, P.; KHAJOTIA, S. Study to evaluate association of umbilical coiling index and perinatal outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 6, n. 2, p. 408–412, 2017. DOI: 10.18203/2320-1770.ijrcog20170025. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/1363. Acesso em: 4 dec. 2025.