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.
The risk of premature ovarian failure risk increases in women who have relatives with the condition. Women at risk for surgical or treatment-induced menopause are those who are undergoing treatment for cancer or other conditions that require surgical removal of the female organs.