title: Early antenatal diagnosis of spina bifida in a twin fetus by ultrasonic examination and alpha-fetoprotein estimation.
mesh_terms: D000328:Adult; D000653:Amniotic Fluid / Q000032:analysis; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis; D016135:Spinal Dysraphism / Q000175:diagnosis*; D013997:Time Factors; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins