Incidence at birth of different types of limb reduction abnormalities in Hungary 1975-1977.

Congenital limb reduction abnormalities have been reported in Hungary since 1970. A clinical and genetic study was made of 274 cases reported from 1975 to 1977, corresponding to a total number of 561915 births. A classification according to type of defect, involvement of one or more limbs and other associated defects is attempted. Data on incidence, sex ratio, laterality and mortality are presented.