title: Antenatal diagnosis of Niemann-Pick disease in a twin pregnancy.
abstract: An Ashkenazi Jewish woman had a child with Niemann-Pick disease in her first marriage. She subsequently remarried a man who was also heterozygous for the condition and conceived twins. Prenatal diagnostic tests were performed and one twin was shown to be homozygous and the other heterozygous for Niemann-Pick disease. The problems of prenatal diagnosis and counselling in twin pregnancies are discussed.
mesh_terms: D004200:Diseases in Twins; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D009542:Niemann-Pick Diseases / Q000175:diagnosis*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014427:Twins