Genetic amniocentesis in twin pregnancy.
D000328:Adult; D000649:Amniocentesis; D000757:Anencephaly / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D014429:Twins, Dizygotic; D014463:Ultrasonography