The imbalance in the secretions of thyroid can cause irregular menstrual cycles-in both possible hyperthyroidism (too much thyroid hormone) and hypothyroidism (insufficient thyroid hormones).Perimenopausal, premature menopauseIf you step into the age of 35, think of the cause of premature ovarian failure due to menopause or is entering the stage of menopause. This is about the time that estrogen in the body strong change alter the menstrual cycle.
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