Timetable For Human Ossification
| Time period | Bones affected |
|---|---|
| Third month of embryonic development | Ossification in long bones beginning |
| Fourth month | Most primary ossification centers have appeared in the diaphyses of bone. |
| Birth to 5 years | Secondary ossification centers appear in the epiphyses |
| 5 years to 12 years in females, 5 to 14 years in males | Ossification is spreading rapidly from the ossifcation centers and various bones are becoming ossified |
| 17 to 20 years | Bone of upper limbs and scapulae becoming completely ossified |
| 18 to 23 years | Bone of the lower limbs and os coxae become completely ossified |
| 23 to 25 years | Bone of the sternum, clavicles, and vertebrae become completely ossified |
| By 25 years | Nearly all bones are completely ossified |
Read more about this topic: Ossification
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