A decline in the incidence of cleft lip and palate in Western Australia, 1963 to 1972.
D001315:Australia; D002971:Cleft Lip / Q000453:epidemiology*; D002972:Cleft Palate / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008499:Medical Records; D012189:Retrospective Studies; D012621:Seasons; D012737:Sex Factors