A member asked:

Had t4 1.2, tsh 4.464 on day19 pd-off mini pill 2/3/14-(testing hormones to see if recovered from mini pill)40yr. is abnormal tsh due to pill possibly

A doctor has provided 1 answer

See answer: Yes, birth control pills (primarily the estrogen component) can affect thyroid function test results: t3, (liothyronine) t4, and tsh, especially the latter. In an individual taking birth control pills, the best thyroid test to analyze thyroid function is a free T4 as opposed to a t4.

Answered 9/28/2016

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