Dysgenesis may refer to:
Dysgenesis (embryology), abnormal organ development during embryonic growth and development Gonadal dysgenesis Adrenal dysgenesis Thyroid dysgenesis Anterior segment mesenchymal dysgenesis Hybrid dysgenesis, a high rate of mutation in germ line cells of Drosophila strains
See also Dysgenics, any decrease in the prevalence of traits due to selective pressure disfavouring their reproduction