Cortisol changes: Your BBT is based on taking your temperature when the diurnal aka bio-rhythm run by the hormone Cortisol is least active in the A.M. Once the day begins, Cortisol production will rise and that will change your BBT. If you think you are pregnant, run a pregnancy test.
Answered 1/8/2016
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A doctor has provided 1 answer
2 doctors weighed in across 2 answers
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