Some parents like to swaddle their babies to prevent them from moving around in their sleep. However, British orthopedic experts warn that swaddling can restrict the movement of babies’ legs and affect hip development. Experts suggest that infants should have enough space to stretch when they sleep, and should not be swaddled too tightly even if they are swaddled. Researchers at a hospital and other institutions report in a new issue of the Archives of Pediatric Disease that more and more parents prefer to wrap their infants’ limbs in sheets or blankets. In North America, around 90% of babies under half a year old are swaddled to sleep, and the number of parents in the UK using this method to help their children fall asleep has increased dramatically in recent years. But the survey found that the method increases the risk of hip dysplasia in infants, with higher rates of hip dislocation among infants in countries and regions where swaddling is more common. Some parents believe swaddling gives infants a sense of security, helps them sleep and provides protection, the researchers said. But infancy is a critical period of joint development, limbs, especially legs, long time fixed is very unfavorable, and kicking, leg free bending and other actions to let the joints fully active to ensure normal development.