1.Please pay attention to congenital appearance of obvious limb anomalies, including congenital limb defects, polydactyly, syndactyly, oblique neck, corpus cavernosum, funnel chest, etc. 2.Please be careful of injuries caused by poor delivery, such as clavicle fracture, brachial plexus nerve injury, cerebral palsy, etc. 3.Please distinguish the difference between postural deformation and real skeletal abnormalities caused by fetal position. For example, inversion of the foot. 4.Please do a special hip screening to detect congenital (developmental) hip dysplasia and dislocation, which are easily overlooked.