title: Counseling and screening for chromosomal abnormalities.
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Kahn
authors.forename: Glenna C L
authors.initials: GC
authors.lastname: Bett
mesh_terms: D003376:Counseling; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005820:Genetic Testing / Q000706:statistics & numerical data / Q000639:trends*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000639:trends*