1. Prepared according to the structure of infants of childbearing age;

2. Applicable to the development of various brands of ultrasonic equipment;

3. Under ultrasound, key points such as the straight ilium, the lower edge of the ilium, the femoral head, the labrum, the joint capsule, and the synovial fold can be observed.

4. It can meet the requirements for measurement practice and teaching of the Graf method under ultrasound guidance.

5. Exercise hand-eye coordination and basic skills training under ultrasound guidance.