"lateral end: 5 weeks in utero"
"body: 8 weeks in utero"
"diaphysis (shaft): 8 weeks in utero"
Expected headings
"Ossification centres of the clavicle"
"Ossification centres of the scapula"
"Ossification centres of the proximal humerus"
"Ossification centres of the pectoral girdle can be divided into each of the three bones that form it: clavicle, scapula and proximal humerus."