Why is ossification helpful?
I think at this point that you’re specifically asking about endochondral ossification associated with fetal bone formation, though I have to admit I’m not entirely certain since your question is vague and you don’t have a lot of detail above. Babies’ bones essentially start out as growing cartilage (the firm-yet-squishy bits of your body like your nose and ears are made of this). Ossification essentially hardens and fuses these bones together over time to form a complete adult human skeleton, at which point bones no longer grow except at the ends. There are plenty of reasons for this, like allowing the baby to actually get bigger. The most obvious reason is that it protects the baby and mother during childbirth. It keeps the baby safe by allowing the body more flexibility, which keeps the baby’s ribs, skull, collarbone, etc. from being crushed through the passage down the birth canal. It also helps mom not break her own hips (and therefore debilitate herself) or be torn open more than
