Clubfoot is a treatable birth defect affecting the feet and ankles of newborns, with a noticeable inward curve of the toes, heel and medial (inner) arch. Approximately one in every 1,000 newborns has clubfoot, with two thirds of these cases affecting boys and one third affected on both feet. The incidence is more likely if there is a history of the defect within the family. Clubfoot occurs in varying degrees of severity and may be treated by stretching and casting. In some cases surgery is necessary.