[Effect of birth weight on hip maturation in the newborn infant].

In 2018 consecutive newborn ultrasound examination of the hip was performed according to the method of Graf within the first 14 days of life (average 4th day). Typ IIa was seen as normal in newborn child. Birth weight was classified according to standards of Lubchenco and Hohenauer. Newborn with high birth weight (LGA) revealed an incidence of CDH (Typ IIc according to Graf or worse) nearly twice as high as in normal weighted newborn (AGA) (6.11% vs 3.51% [Lubchenco] and 7.95 vs 3.09 [Hohenauer]). Even in children with birth weight between 75th and 90th percentile we found a CDH incidence of 5.54%. Ultrasound examination of the hip is suggested in newborn children with high birth weight because of a higher risk for development of a CDH. Other risk-factors like breech position or of CDH.