Unfortunately, removal of any part of the "reproductive" system (uterus, one or both ovaries, one or both tubes) can permanently disrupt the whole hormonal / endocrine system. The ovaries of women with all their parts produce hormones their whole lives and are critical to good health and normal aging.
It's hard to say what her remaining ovary will do. It may function normally for years, sub-optimally for years or it could shut down completely at any time. Ovary removal and post-hysterectomy ovarian failure is associated with a number of age related conditions such as heart disease, osteoporosis, dementia, Parkinson's, memory and cognitive impairment, lung cancer, vision changes, hair and skin changes, sexual dysfunction. Estrogen may help with symptoms and may mitigate some of the risks.
Dear AnnAnnie Brooke
Thanks for your soon reply
It means with one ovary does she will have enough hormone to avoid osteoprosis and aging process such as wrinkle,hot flashes,...?
I am too worry
If her uterus is now removed, she won't have a period any more, but if she still has an ovary, she should still have enough hormones to forestall hot flashes until she goes through menopause in the normal course of events.