You are guaranteed to experience early menopause if you have your ovaries removed. These organs produce eggs and estrogen. When the ovaries are surgically removed, menopause begins immediately. Women have their ovaries removed for a number of reasons, but primarily to treat and lower the risk for certain cancers. Removal of the uterus can bring on symptoms of menopause, too.
You may experience early menopause if you undergo other medical treatments that can damage the ovaries. These include chemotherapy and radiation treatments for certain cancers.
Some diseases can harm the ovaries, making them unable to produce eggs and estrogen. They include diseases of the immune system, such as rheumatoid arthritis, and certain genetic conditions.