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Menstrual Cycle & Thyroiditis
Answered by
Mark Lupo, M.D. - Thyroid Nodules, Thyroid Cancer, hyperthyroidism, hypothyroidism, Thyroid Ultrasound
Thyroid & Endocrine Center of Florida Sarasota - FL
Questions in the Thyroid forum are answered by Mark Lupo, MD. Topics covered include Goiter, Graves Disease, Hyperthyroid, Parathyroid/Calcium Problems, Thyroid Cancer, Thyroid Nodules/Cysts, Thyroiditis, Thyroid & Pregnancy, Thyroid Stimulating Hormone (TSH), Thyroid Tests, and Thyroid Surgery.

Menstrual Cycle & Thyroiditis

by JJKVI, Sep 04, 2007 08:29AM
Diag. with postpartum thyroiditis and waiting to see if I have Hashi.  Since giving birth I have been hyper, normal, hypo, normal & then hypo again with suspicion that I have been hyper in between lab work. I have two questions both relating to a woman’s menstrual cycle:

1) I can tell if I am hyper/hypo or normal by my PMS symptoms. My symptoms (whether hyper or hypo) do not really bother me except during those couple of days before my cycle begins. And when I tested normal, PMS symptoms were very mild. What’s happening? Are the thyroid hormone levels affecting the level of the other “female” hormones or the other way around?

2) Can thyroid levels be affected by a woman’s cycle? Meaning, if you test a patient at the beginning of her cycle versus at the end of her cycle would there be any difference?

by Mark Lupo, M.D., Sep 05, 2007 05:55AM
1) no - thyroid imbalance may cause menstrual/PMS irregularitites but you cannot tell hyper vs hypo on this alone.  blood tests are the only reliable way to distinguish hypo vs hyper.

2) There is not usually a significant difference.
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