RAVAL, B. M.; SISODIYA, V. P.; YADAVA, P. A.; MEHTA, S. T.; PATEL, S. R.; DADHANIA, B. H. Measurement of cervical length using transvaginal sonography for prediction of preterm labour. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 9, n. 11, p. 4471–4476, 2020. DOI: 10.18203/2320-1770.ijrcog20204795. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/8989. Acesso em: 4 oct. 2025.