What is the ruling on hysterectomizing an incapacitated woman, such as one who is insane, for fear of her becoming pregnant through fornication?

It is permissible to perform medical surgeries under certain conditions: that the surgery is lawful, and that the patient is in need of it due to fear of death, damage to an organ, or to alleviate pain. Furthermore, surgery involves torment and pain, so it is not permissible except out of necessity or dire need, and the surgical operation must be the only option, meaning no other means are available. It is also well-known that the removal of the uterus for such women might embolden the corrupt due to the absence of fear of pregnancy.