NATH, J.; A. K., B.; R. K., T. A clinical study on ultrasonographic measurement of cervical length at 18-24 weeks of gestation and pregnancy outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 5, n. 4, p. 1088–1092, 2016. DOI: 10.18203/2320-1770.ijrcog20160863. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/879. Acesso em: 4 dec. 2025.