My friend’s wife just got her ovary removed due to cyst and last Sunday as I was reading the local newspaper, I came across an article that talks about the risk of removing the ovary before menopause. Studies in US has shown that those who removed their ovary due to cancer and cyst will be at higher risk of getting the Parkinson disease and memory problem.
From ScienceDaily:
Mayo Clinic researchers have found that surgical removal of both ovaries doubles a woman’s risk of developing Parkinson’s disease and parkinsonism many years later in life. They also discovered that the younger a woman is at the time of the surgery, the higher her risk.
Once a woman does not have any ovary, the women sex hormone called the estrogen is reduced. Estrogen in defending the brain from attack as a woman ages.
The detail is in the link provided above. 
September 7th, 2007 at 1:32 pm
Removed of ovary will not only affect a woman hormone change. Some woman having spiritual problem after that too. This is the most different part to cure.