Follicle Stimulating Hormone, (FSH), is one of many hormones that your body uses to regulate your
menstrual cycle and to control the maturation of your eggs.
FSH signals the ovaries to mature one or more eggs for ovulation each month/cycle.
If your ovarian reserve (eggs) is low in quantity or quality, your pituitary will produce higher than normal FSH levels early in the cycle, trying to stimulate your ovaries to produce a mature egg.