The prenatal detection of hereditary defects.
D000653:Amniotic Fluid / Q000166:cytology*; D002869:Chromosome Aberrations / Q000175:diagnosis; D025063:Chromosome Disorders; D046508:Culture Techniques; D005260:Female; D030342:Genetic Diseases, Inborn / Q000175:diagnosis*; D006801:Humans; D008297:Male; D011247:Pregnancy