In other words, the deep structure of primate ovaries might be fundamentally geared for a life span of about fifty years. We can live longer, but we won’t be as good at making babies, and the rest of our bodies are also shutting down. If that’s the case, then it would seem that the thing that changed in our Eves might not have been in their ovaries. Instead, women somehow delayed aging in the rest of their bodies, and human ovaries haven’t had a chance to catch up yet.