Congenital abnormalities.
D000328:Adult; D002170:Canada; D004314:Down Syndrome / Q000175:diagnosis* / Q000453:epidemiology / Q000235:genetics; D005060:Europe; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D008875:Middle Aged; D009436:Neural Tube Defects / Q000175:diagnosis* / Q000453:epidemiology / Q000235:genetics; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D012008:Recurrence; D012306:Risk; D014481:United States