title: Maternal serum alpha-fetoprotein levels in second trimester.
authors: P
authors: P
authors: Sugkraroek
authors: T
authors: T
authors: Tongyai
authors: S
authors: S
authors: Ajjimakorn
mesh_terms: D000328:Adult; D000649:Amniocentesis; D005260:Female; D006801:Humans; D009436:Neural Tube Defects / Q000097:blood / Q000175:diagnosis; D011247:Pregnancy / Q000097:blood*; D011262:Pregnancy Trimester, Second; D012016:Reference Values; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins