Evaluation of first-trimester PAPP-A and β-hCG levels in isolated single umbilical artery pregnancies and their association with adverse perinatal outcomes. Annals of Medical Research, [S. l.], v. 33, n. 3, p. 121–127, 2026. Disponível em: http://www.annalsmedres.org/index.php/aomr/article/view/4919. Acesso em: 30 mar. 2026.