2024. 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, 3 (May 2024), 10–15. DOI:https://doi.org/10.24018/ejmed.2024.6.3.2107.