Oophorectomy has consistently been found to cause excess weight gain, and this is prevented by estrogen replacement -- from NAMS April 2009 newsletter (free signup required to read)

This link is for a pdf of the NAMS April 2009 newsletter with articles on weight gain in menopause and recommendations for Vitamin D intake.

The current study of ethyl-eicosapentaenoic acid for the management of psychological distress among middle-aged women produced primarily negative results, which is consistent with other clinical trials of fish oil for depression. At this time, there is insufficient evidence to recommend fish oil for the treatment of depression.(free signup required to read)

Basic introduction and resources

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"While breast cancer and ovarian cancer were less frequent in women who had their ovaries removed, the overall risk of death from all types of cancer was higher among women who had their ovaries removed. When we considered just the women who never used estrogen therapy after surgery, we found that women who had removal of their ovaries had a higher risk of stroke and lung cancer, and women who had removal of their ovaries before age 50 had a higher risk of heart disease, stroke and death from any cause. " Although this site isn't identified as to source, it seems to be wholly devoted to this one study and medically sound in the information it presents

In other words, we were right all along that hormone fluctuations make us stupid. (free signup required to read)

Simplistic overview of the surgery from a medical perspective. Terminology somewhat overinflated but it's readable and provides basic description. (free signup required to read)

"Compared with ovarian conservation, bilateral oophorectomy at the time of hysterectomy for benign disease is associated with a decreased risk of breast and ovarian cancer but an increased risk of all-cause mortality, fatal and nonfatal coronary heart disease, and lung cancer," the study authors write. "In no analysis or age group was oophorectomy associated with increased survival."