“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 6, no. 3 (May 31, 2024): 10–15. Accessed October 10, 2025. https://www.ej-med.org/index.php/ejmed/article/view/2107.