When does the second ossification center develop?

The second ossification center, also known as the secondary ossification center, typically develops after birth in long bones. It usually appears during childhood, around the ages of 1 to 2 years, in areas such as the epiphyses. This process plays a crucial role in bone growth and development, contributing to the formation of the bone's structure as it matures. The timing can vary depending on the specific bone and individual growth patterns.