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 gonadotrophin releasing hormone, also affects the functioning of the hypothalamus which in turn affects the pituitary gland, which then affects the ovaries, fallopian tubes and uterus. The imbalance of estrogen hormones can also cause menopause and all the symptoms associated with it. These hormones are influenced by certain factors such as nutrition, diet, lifestyle, exercise, stress, emotions, age and ovulation.