title: Anencephaly and twins: prenatal ultrasound and estriol.
abstract: A rare case of anencephalic twin pregnancy diagnosed prenatally with ultrasonography is reported. It is the only case found in the literature in which maternal 24-hour urinary estriol is documented in an anencephalic twin pregnancy. Ultrasound diagnosis and obstetric problems associated with such cases are discussed briefly.
mesh_terms: D000757:Anencephaly / Q000150:complications / Q000175:diagnosis*; D004200:Diseases in Twins; D004964:Estriol / Q000652:urine; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D006831:Polyhydramnios / Q000150:complications; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography
chemical_list: D004964:Estriol