This condition refers to malformation of the hip joint during fetal development. In this condition, the head of the thighbone or femur, does not sit properly in the socket of the pelvis.

What is going on in the body?

Joints and bones usually grow normally during fetal development. However, in a small percentage of newborns, the pelvis has not formed its usual deep socket. Therefore, the head of the thighbone can slip partially or completely out of the socket.

What are the causes and risks of the condition?

This condition can be caused by the way the legs of the fetus are positioned in the womb. It is more likely to occur in people with a family history of the disorder. It also affects girls more often than boys. It is three times more likely to occur in the left hip than the right. It is more common after a breech delivery, among large babies and in twins. Congenital hip dislocation is frequently associated with other conditions such as spina bifida, sternomastoid torticollis, or Down syndrome.