A. High levels of
FSH most often are due to the approach of menopause. But it doesn’t happen all at once and sometimes
FSH levels go up and down for months or even years. Stress usually causes
FSH levels to be lower or stay the same, not rise. High FSH levels can be due to a pituitary tumor that secretes FSH. These are not cancer and are very rare. Sometimes the body attacks its own hormone secreting cells and causes an inflammation of the ovary. That is also very uncommon. There are also other rare FSH producing tumors. However, a high blood level of FSH together with not having a period for one year does sound like menopause may be the most likely reason.
Although most women enter menopause after age 40 and the mean age is 51 years of age, one to four percent of women go through premature menopause, which is defined as menopause before age 40. The fact that you had a cyst removed might not be a cause at all; but it could contribute to the problem if a large amount of ovary tissue had to be removed. If you are thinking about having a baby and are in a position to try, it is always easier to conceive before age 40 even if your FSH level is normal.
Machelle M. Seibel, MD