
18/09/2025
BBT charting is my preferred way of tracking cycles when my patients are trying to conceive.
Thanks for this great explanation of measuring progesterone Lara Briden - The Period RevolutionaryRevolutionary
✨ Your basal body temperature is a built-in progesterone detector. ✨
A great way to assess progesterone is to think in terms of progesterone days — the days you actually make progesterone. More progesterone days mean more of its benefits for your uterine lining, breasts, brain, and immune system. That’s why temperature tracking (BBT charting) is such a great way to assess the duration of your luteal phase and know if you’re making enough progesterone.
You can also measure progesterone with a blood test or at-home urine test, but timing is everything. Your peak progesterone will be mid-luteal — about 7 days after ovulation and 7 days before your next period. That might be “day 21” in a 28-day cycle, but in a shorter or longer cycle, the mid-luteal day shifts, too.
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