The intrauterine hip position coincides with the so called squatting position with more than 90 degrees of flexion. This position is considered the best prerequisite for physiological development of the infant hips. In this position, pressure is equally distributed and there is no tension on the capsular blood vessels. A hip flexion splint is described which in a simple way provides for a reliable fixation of a newborn's hip in a flexion angle of more than 90 degrees an also for controlled abduction. Our splint is indicated in hip dysplasia. The paper illustrates the application on this inexpensive splint and its day-to-day care. Also we report on third party experience. The paper is summarized in the initial poster presentation.