title: Increased amniotic alphafetoprotein due to a haloacardium amorphous twin.
mesh_terms: D009008:Abnormalities, Severe Teratoid; D000328:Adult; D000653:Amniotic Fluid / Q000032:analysis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D014427:Twins; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins