RAJESH, A.; MURALIDHARAN, V. Serum beta hCG in early second trimester as a predictor of gestational hypertension. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 6, p. 2355–2359, 2018. DOI: 10.18203/2320-1770.ijrcog20182349. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/4796. Acesso em: 11 nov. 2025.