P., S. S.; AGARWAL, R.; M. ANILKUMAR, J.; RAMCHANDRAN PILLAI, A. Cervical length measurement by transvaginal sonography in predicting preterm labour in low risk women. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 6, n. 12, p. 5563–5567, 2017. DOI: 10.18203/2320-1770.ijrcog20175282. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/3880. Acesso em: 25 nov. 2025.