title: Alpha-fetoprotein (AFP) levels in maternal serum in early multiple pregnancies.
mesh_terms: D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011272:Pregnancy, Multiple; D014310:Triplets; D014427:Twins; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins