Studies show that ovary removal or post-hysterectomy ovarian failure increases risk for many health problems including heart disease (the #1 killer of women), osteoporosis, hip fracture, cognitive
and memory impairment, dementia, Parkinsonism, mood disorders (depression, mood swings, anxiety, irritability), vision and skin changes, poor sleep quality, urogenital atrophy, sexual dysfunction, more severe hot flushes (I think that's all of them!).