Prediction of hypertensive disorders in pregnancy by estimation of maternal serum beta HCG levels in the mid-trimester (13-20 weeks) of pregnancy. International Journal of Biomedical Research, [S. l.], v. 9, n. 10, p. 354–357, 2018. DOI: 10.7439/ijbr.v9i10.4903. Disponível em: https://ssjournals.co.in/index.php/ijbr/article/view/4903. Acesso em: 16 feb. 2026.