The incidence of chromosomal malformations.
D002869:Chromosome Aberrations / Q000453:epidemiology*; D025063:Chromosome Disorders; D005260:Female; D005313:Fetal Death / Q000209:etiology; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male; D011123:Polyploidy; D011247:Pregnancy; D012729:Sex Chromosome Aberrations / Q000453:epidemiology