Familial Incidence Of Cleft Palate

Abstract

A review of the literature and a study of 235 histories of cleft palates shows that the sex ratio in cleft palate births is probably in the neighborhood of 1.5 to 1. Cleft palates occur more frequently in the families of cleft palate cases than in the families of non-cleft palate cases. Heredity probably plays an important role in the etiology of cleft palate. Environmental factors, however, are also important.