Study of first-trimester serum levels of β-hCG and PAPP-A as a screening test for fetal development of intrauterine growth restriction
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Objective: To evaluate the association between first-trimester serum levels of pregnancy-associated plasma protein-A (PAPP-A) and free beta-human chorionic gonadotropin (β-hCG) and the development of intrauterine growth restrict... ...
