HEFILA, N. M.; ELFAZARI, H. A. Transvaginal ultrasound for cervical assessment versus digital vaginal examination during active phase of labour. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 10, n. 7, p. 2547–2552, 2021. DOI: 10.18203/2320-1770.ijrcog20212318. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/10325. Acesso em: 2 oct. 2025.