Investigating the Relationship between Serum Levels of PAPP-A and Free β-hCG in the First Trimester of Pregnancy with Placental Thickness and Percentile of Fetal Weight in Third Trimester Ultrasound. European Journal of Medical and Health Sciences, [S. l.], v. 6, n. 3, p. 10–15, 2024. DOI: 10.24018/ejmed.2024.6.3.2107. Disponível em: https://www.ej-med.org/index.php/ejmed/article/view/2107. Acesso em: 10 oct. 2025.