Ossification of the pelvis: secondary centers for the bovine occur at approximately what age?

• A. 1 year
• B. 7-8 years
• C. 4-5 years
• D. 2 years

Answer: (C)

Secondary ossification centers in the bovine pelvis mark a stage where the pelvic bones are still growing and approaching maturity. In cattle, these centers appear in the pelvic bones (ilium, ischium, and pubis) around mid-life, roughly at 4–5 years of age, and they will fuse with the main bone as growth completes. This timing helps differentiate between bones that are still maturing and those that have largely fused. Earlier ages would not yet show these centers, while much later ages would reflect completed fusion.