Guo X, Wang F, Li J, Guo Z, Wang J. Prediction performance of serum placental growth factor (PLGF) human chorionic gonadotropin β (β-hCG) and PAPP-A levels in early pregnancy for pregnancy outcomes. Pak J Med Sci [Internet]. 2022Aug.30 [cited 2024Apr.26];38(7). Available from: https://pjms.org.pk/index.php/pjms/article/view/5248