SINGHAL, N.; GUPTA, A. S. An observational study to determine accuracy of various methods used to assign gestational age and correlate with outcome. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 9, p. 3790–3795, 2018. DOI: 10.18203/2320-1770.ijrcog20183796. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/5289. Acesso em: 29 dec. 2025.