What researchers did find is that women who have their ovaries and uterus removed to treat fibroids, for example, tend to gain more weight in the years afterward.
It is suspected that changes in hormone production after ovary removal explain the findings. That's because women who go through menopause naturally experience a gradual drop in hormones.
With ovary removal there is an abrupt halt to hormone production.
There is more in the International Journal of Obesity.