In about 0.4 percent of infants, the ball at the head of the thigh bone does not fit snugly into its socket in the hip bone. In a newborn, this is a potential rather than an actual problem. It is much more common in girls than in boys, and following breech births and pregnancies where there is an abnormally small amount of amniotic fluid in the uterus.
A doctor will check your baby’s hips for excessive mobility as part of routine tests after birth. Treatment such as manipulation and splinting can prevent trouble in later infancy. In severe cases, an operation may be needed.
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