title: Alpha-fetoprotein (AFP) levels in maternal serum in relation to transabdominal amniocentesis in early pregnancy.
mesh_terms: D000649:Amniocentesis; D000653:Amniotic Fluid / Q000032:analysis; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins