Problems in genetic counseling.
D002869:Chromosome Aberrations / Q000517:prevention & control; D025063:Chromosome Disorders; D000013:Congenital Abnormalities / Q000517:prevention & control; D003376:Counseling; D004777:Environment; D005053:Eugenics; D005808:Genes, Recessive; D030342:Genetic Diseases, Inborn / Q000517:prevention & control*; D006579:Heterozygote; D006801:Humans; D010375:Pedigree; D012729:Sex Chromosome Aberrations / Q000517:prevention & control