Flora Bay 26 minutes ago @ltTBm yeah...it doe. At a certain point. Your bones are actual bones. Your brain is developed. At a certain point in age Females who become pregnant are not high risk, if fully healthy until again when they are older and can be labeled as having a geriatric pregnancy. At a certain age, certain measures that can taken for certain medical issues that help children will not work for older individuals and etc. I could ask my husband. Because I could be wrong He isnt fully verse in biology but he knows more than me. He only studied molecular & cellular but not biology and im not being sarcastic. I do want to ask him before i make an ass out of myself. I have no idea. Im just going off memory and experience. My studies are in neuro. So I'm not really sure. In depth, i might be a bit ignorant about it I apologize Show less REPLY はり·なり1 second ago @Flora Bay it is not a clear cut point in time, development varies puberty in females can start as early as 9, or as late as 15, in males it varys around 12-14 .... CLEARLY development stages do not occur at fixed points