1. Developmental deformities of the lower extremities in children are most frequently the result, either directly or indirectly, of sleeping, sitting, and play habits of infancy.
2. Some of these deviations persist while others may disappear with normal development under favorable conditions of symmetrical activity.
3. It is not always possible to determine which of these malalignments will disappear and which will not. Since we are not safe in assuming that a!! of them will disappear spontaneous!y, measures should be taken to correct objectionable twists and bowings already present, and to prevent the development of other deformities.