My wife is going on 54, and the end of her fertility period (menopause) is happening. There are issues, but there are solutions to said issues too. As for her body, she has kept it in good shape, and has never quickly gained and lost weight, so she does not have the messed up stomach some women end up with.
If you marry a woman and stay with her for life, you will experience all the changes both of you go through physically and health wise. The key is to understand that it is natural and to have grace for each other. We can all find flaws, because that is easy. What is bettter is to see everything else that comes with years of support and love as the benefits of that lasting relationship and aging together.