Aim: The necessity of hip sonography scan is accepted by all authors. However, there is no clear information about when the scan is required. In this study, we tried to find out the most appropriate time for screening and reported our results of hip sonography performed in our clinic. Materials and Methods: Records of 351 infants were retrospectively investigated, and spontaneous correction in developmentally retarded hips was evaluated by Graf's method. Ages of infants were between 3-29 days; the average age was 11 days. Results: Three hundred and eighty hips were evaluated as type 1 (%54). Babies who were evaluated at three and four weeks of age, the ones that assessed as types 2c, d, 3 and 4 got initial treatment. Fourteen hips of 11 babies received treatment. All of the type 2a+ (71 hips) and all but two of type 2a-(82, %97.6) had become type 1 without treatment. Among 11 hips that were type 3 at week one, 3 type 3 hips of two babies that came back for control, returned to normal without treatment. Even the hips considered type 2c in this age group can return to normal without treatment. Discussion: According to our dataset, because hips that were evaluated as undeveloped at the first screening returned to normal at an average of 7 weeks, the ideal time for screening is 7th week of life.