Heavy And Frequent Menstrual Periods:
The thyroid hormone helps to control the menstrual cycle. Too little or too much thyroid hormone production can make menstrual periods very irregular, heavy, or light. The thyroid problem also can affect your periods and thus, it may stop for a few months or more, this condition is called amenorrhea.
In case your immune system sources thyroid ailment, other glands, together with your ovaries, may also be involved. Thus, it can bring about early menopause (even before the age of 40).