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What is the relationship between thyroid hormone and estrogen? Why there's amenorrhoea in hyperthyroidism and menorrhagia in hypothyroidism?

1 doctor weighed in
Dr. Philip Kern
Internal Medicine - Endocrinology

In brief: Thyroid and periods

With either hyper or hypothyroidism, there can be a wide variety of menstrual disorders.
It is not just a matter of estrogen, the cycling of estrogen and Progesterone is usually thrown off.

In brief: Thyroid and periods

With either hyper or hypothyroidism, there can be a wide variety of menstrual disorders.
It is not just a matter of estrogen, the cycling of estrogen and Progesterone is usually thrown off.
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