Study of isolated apparent amniogenic limb deficiency in Hungary, 1975–1984

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Abstract
A population‐based and validated data set of 206 cases with apparent amniogenic limb deficiency was ascertained in Hungary between 1975 and 1984. Such limb defects frequently (36%) associated with nonlimb abnormalities. In 134 cases with isolated defects typically more limbs are affected, upper and lower limbs, right and left sides, and both sexes are equally affected. Case‐control analysis of such isolated cases indicates a lower socio‐economic status of parents, a higher parity, more frequent unwanted pregnancies, preterm birth, and a higher rate of threatened abortion. Familial occurrence was not found in 415 first‐degree relatives.