Humeral fracture. The infant was G2P1 with a gestational age of 39+2 weeks, forceps delivery, and birth weight of 4,000 g. The patient was admitted to the hospital 20 h after birth due to a 6-h fever. The diagnosis was intrauterine pneumonia. Physical examination revealed swelling, tenderness, limited mobility, and loss of the primitive reflex of the right upper limb; thus, the fracture was suspected. Ultrasound showed interrupted cortical continuity, visible broken ends, displacement, separation, and angulation of the right humerus.