title: Down syndrome and frequency of intercourse.
mesh_terms: D000293:Adolescent; D000328:Adult; D003075:Coitus; D004314:Down Syndrome / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D010331:Paternal Age; D012746:Sexual Abstinence; D012725:Sexual Behavior; D013997:Time Factors