[Incidence of congenital hip dislocation in 40,243 live births (I)].

During the period between 1981 to 1985, 40,243 children have been born. Among these children, 1,747 suffered from dysplasia, subluxation or dislocation of the hip. In this paper the following parameters are examined: frequency, sex, the hip affected and the order of birth. Dislocation of the hip is more frequent in females with a ratio of 5.3 to 1. The hip more frequently affected is the left. Fifty percent of the children affected are first-born. In this study we want to emphasize the importance of a thorough explanation of the newborn, due to the frequency of the affection and especially its greater frequency in female and its predominance in the left hip.