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Ossification centers of the pectoral girdle

Last revised by Dr Yuranga Weerakkody on 04 Aug 2020

Ossification centers of the pectoral girdle can be divided into each of the three bones that form it: clavicle, scapula and proximal humerus.

Ossification centers of the clavicle
  • lateral end: 5 weeks in utero
  • medial end: 15 years
Ossification centers of the scapula
  • body: 8 weeks in utero
  • coracoid process (two centers): 12-18 months
  • glenoid: 10-11 years
  • inferior angle: 14-20 years (puberty)
  • acromion (three centers): 14-20 years (puberty)
  • medial border: 14-20 years (puberty)
Ossification centers of the proximal humerus
  • diaphysis (shaft): 8 weeks in utero
  • head: 1-6 months
  • greater tubercle: 1 year
  • lesser tubercle: 3-5 years

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