PAWAR, P.; GOYAL, R.; KAUR, H.; SINGAL, N. Study of significance of elevated maternal serum β-human chorionic gonadotropin (β-hCG) level in 16 to 20 weeks pregnant women as predictor of hypertensive disorder of pregnancy. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, [S. l.], v. 7, n. 11, p. 4721–4730, 2018. DOI: 10.18203/2320-1770.ijrcog20184537. Disponível em: https://www.ijrcog.org/index.php/ijrcog/article/view/5621. Acesso em: 14 oct. 2025.