MSFinals-2601

A 35-year old woman who is currently 20 weeks pregnant is concerned about the possibility of her child having congenital hip dislocation. She herself had the condition at birth, which went undiagnosed for 15 months and required corrective surgery. Despite the surgery, she has experienced hip pain throughout her adult life and is now scheduled for a hip replacement due to osteoarthritis. What is a known risk factor for congenital hip dislocation?