Have a look at the web site of the British based 'Diving Diseases Research Centre' at
www.ddrc.org , you will find some information there on 'women and diving' which may be of interest to you. Alternatively try emailing a lady there by the name Marguerite St Leger Dowse, who is doing all this research on women and diving and may be able to answer your questions in more detail.
I've had a good search through my own data on women and diving issues, but unfortunately most topics concerning our more mature female divers centre on osteoporosis and the risk of decompression illness. Check out the DDRC website and an article there called 'Physiology and the female diver':
I found this in my own files which may help:
"Old age, menopause & osteoporosis:
There is no pool of diving data to indicate that women are at any more or less risk of ADI or osteonecrosis when peri-menopausal or post-menopausal. Average menopausal age is 50, osteoporosis usually starts between ages 60-65 and fractures average at 70-75.
Osteonecrosis and osteoporosis have differing pathophysiologic mechanisms; osteonecrosis resulting from blockage of the small blood vessels of the bone, while osteoporosis comes from changes in cellular activity. Diving does not seem to have any effect on the changes in the osteoblasts and clasts that occur with aging and diminished oestrogen.
Good advice would be for the elderly female diver to dive conservatively so as to not add the risk of bubble damage to a porous bone from osteoporosis."
Of course, the first person you should be taking to should be your diving doctor, who will give you accurate safe information. Anything you receive on a web site chat room should of course be taken in the manner in which it is intended. Perhaps make some enquiries on the DAN web site.
kind regards
Dennis Guichard