oophorectomy
"Here's what I had done when I was 38 years old, , a surgeon  removed my ovaries and fallopian tubes, this is called a bilateral salpingo-oophorectomy, or BSO. (Together with a total abdominal hysterectomy this is referred to as a TAH/BSO). He left me with a gash about 8 inches long and told me I'd be on HRT the rest of my life, but I would be fine. The one thing I know for sure is I CAN NOT be without medication, believe me I have tried and the results are unbearable hot flashes, insomnia, mild headaches and the list is long. Started on oral HRT and eventually switched to a patch. The only patch that I have been successful with is the Mylan patch. I use 0.05mg/day and if I am consistent it works well. I am 63 so thats 25 years on HRT."