Does Thyroid Affect Periods?

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.

Does hypothyroidism affect menstrual cycle?

Because women's reproductive systems depend on thyroid hormones, hypothyroidism can affect menstrual cycles. One study showed that over 20% of women with hypothyroidism had some type of irregular period, especially heavy periods or infrequent periods.

Can hypothyroidism stop periods?

Hypothyroidism Can Make Periods Heavy, Absent, or Irregular

Changes in prolactin levels can lead to thinning of the uterine lining and changes in how the pituitary gland controls the ovaries; both can result in periods stopping completely, says Dr. Spencer.