Every time a pregnancy occurs, the womb rejuvenates itself.
In a Science magazine, 2018 a 60 year old womb was transplanted in a 20-30 year old. After several tries, a pregnancy occurred. When it was time for delivery a C-section took place. To the "surprise" of those present, they said the womb looked like a 20 year old womb.
don't get me wrong, I am all against the hanky-panky of doctors playing God. but it shows to the world, the miracle of God's design.