MARIAPPAN, G. R.; PANCHAKSHARAYYA, H. B.; R., G. Placental thickness as a sonographic biomarker for gestational age among singleton pregnancies. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 9, n. 11, p. 4617–4620, 2020. DOI: 10.18203/2320-1770.ijrcog20204821. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/9162. Acesso em: 4 oct. 2025.