How do thyroid problems affect women?

Women are more likely than men to have thyroid disease. One in eight women will develop thyroid problems during her lifetime.1 In women, thyroid diseases can cause:

• Problems with your menstrual period. Your thyroid helps control your menstrual cycle. Too much or too little thyroid hormone can make your periods very light, heavy, or irregular. Thyroid disease also can cause your periods to stop for several months or longer, a condition called amenorrhea. If your body's immune system causes thyroid disease, other glands, including your ovaries, may be involved. This can lead to early menopause (before age 40).
• Problems getting pregnant. When thyroid disease affects the menstrual cycle, it also affects ovulation. This can make it harder for you to get pregnant.
• Problems during pregnancy. Thyroid problems during pregnancy can cause health problems for the mother and the baby.

Sometimes, symptoms of thyroid problems are mistaken for menopause symptoms. Thyroid disease, especially hypothyroidism, is more likely to develop after menopause.