I've a cat I took responsibility for a year ago. He is now 2 years old. He was 'fixed' before I got him. He was never declawed. He is usually REALLY good about not scratching furniture or things he shouldn't. Until Saturday morning. I left my closet open a crack, and he is a curious fellow, and loves the closet for some reason.
Defects in the chromosomes can cause premature menopause. For example, women with Turner's syndrome are born without a second X chromosome or without part of the chromosome. The ovaries don't form normally, and early menopause is often the result.
In cases where the ovaries are removed during the hysterectomy, this causes the body to almost immediately go into premature menopause (only if the woman has not already gone through menopause). This is called surgical menopause and occurs because of the sudden loss of estrogen hormones. The symptoms that are experienced during surgical menopause are often more severe and frequent than regular menopause. Usually these symptoms are controlled using hormone replacement therapy (HRT).