You can do too much research and make yourself worry about nothing.
I'm not trying tell you that women get it worse (though they do ) but I believe in growing old gracefully and that does not mean not trying to keep going and be as fit as possible or not look after yourself. Or worry yourself about it. You could get run over and killed tomorrow and then what was it all about?
But just that you don't have to worry about that sort of thing for a long time yet.
Like I said if you keep fit and active and eat properly you should be fine for another 30 or 40 years yet..... covid permitting!
Once the mind starts dwelling on this sort of thing... it's all downhill!
Nature knows best! But you can help it along with a good diet and moderate fitness.
Even superfit athletes can drop dead in the middle of a marathon or football match. Just accept gracefully the life you have. Cherish every moment doing what you can to make life good for others and you'll live for ever.
Where have I said or inferred I'm worried?
Its not for you. I understand.