A 2-month-old female is brought by her parents for a routine well-child checkup. She is their firstborn child. The pregnancy was uncomplicated. Delivery was at term via vaginal delivery in a breech presentation. The parents report she is feeding well, gaining weight, and they have no concerns about her health or development. There is no family history of hip problems, scoliosis, or other significant musculoskeletal conditions. Her temperature is 37.0^oC (98.6^oF).