The study of chromosome non-disjunction in man.
D000022:Abortion, Spontaneous / Q000235:genetics; D000782:Aneuploidy; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002901:Chromosomes, Human, 13-15; D002902:Chromosomes, Human, 16-18; D004314:Down Syndrome / Q000235:genetics; D005260:Female; D006801:Humans; D011247:Pregnancy; D014314:Trisomy