title: Genetic drift. A permanent bond.
authors.affiliation: Center for Congenital Disorders, Children's Hospital at Montefiore/Albert Einstein College of Medicine, Bronx, New York 10461, USA. RWMarion@aol.com
authors.forename: Robert W
authors.initials: RW
authors.lastname: Marion
mesh_terms: D000649:Amniocentesis; D004314:Down Syndrome / Q000175:diagnosis / Q000235:genetics; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D008297:Male; D010819:Physician's Role / Q000523:psychology*; D010817:Physician-Patient Relations; D011247:Pregnancy; D013997:Time Factors; D016216:Ultrasonography, Prenatal