Genetic cripples.
D002869:Chromosome Aberrations / Q000517:prevention & control*; D025063:Chromosome Disorders; D002875:Chromosomes; D005053:Eugenics; D005260:Female; D030342:Genetic Diseases, Inborn / Q000517:prevention & control*; D006801:Humans; D008297:Male; D011247:Pregnancy