[Risk of recurrence of several congenital malformations: anencephaly, spina bifida, cleft palate and cleft lip].

Recurrence risks were estimated for some congenital malformation from a multifactorial model according to the method given by Smith (1971). Risks were estimated for cleft lip with or without cleft palate, cleft palate alone, anencephaly and spina bifida from data on frequency and heritability collected in France. Results are given in tables representing risks for some 180 specific family histories.