As a healthy adults, the number of bones that you are having now is lesser than that when you were first born because

As a healthy adult, the number of bones you have is indeed fewer than when you were born, and this is primarily due to the process of bone fusion that occurs as we grow.

At birth, a human baby has approximately 270 bones. These bones are often made up of flexible cartilage and are not yet fully ossified. As the child grows, some of these bones gradually fuse together. For instance, the bones in the skull (cranial bones) fuse to form a solid structure to protect the brain, and the bones in the spine also undergo fusion at various stages of development.

By the time a person reaches adulthood, the number of bones typically stabilizes at about 206. This reduction is a natural part of human development, allowing for a stronger and more resilient skeletal structure. Therefore, the change in bone count from birth to adulthood is the result of natural growth processes, including bone remodeling and fusion.