Statistically, women are as much as five to eight times more likely to develop a thyroid problem compared to men. Women in particular are sensitive to changes in the thyroid gland as it aids in regulating menstrual cycles. Both hypothyroidism and hyperthyroidism can cause heavier or irregular periods and make it difficult for a woman to get pregnant. Women in particular are more prone to develop hypothyroidism, especially those over the age of 60.