FFP 648 | Is Progesterone Testing Always Accurate?

In this solo episode, Lisa explores what a progesterone blood draw can and cannot reveal about the luteal phase. Drawing on two studies, she explains why mid to late luteal progesterone levels can vary widely within minutes, why some women who have ovulated may still test low, and why the common cycle day 21 test often misses the mark. Lisa makes the case that progesterone results may be most meaningful when interpreted alongside daily cycle charting data such as basal body temperature and cervical fluid.

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This episode is sponsored by Lisa's new book Real Food for Fertility, co-authored with Lily Nichols! Grab your copy here!

Would you prefer to listen to the audiobook version of Real Food for Fertility instead? 🎧 Listen here!

This episode is also sponsored by FAMM, the Fertility Awareness Mastery MentorshipTM program! Apply now to join the waiting list for our next class!

Have you grabbed your copy of the Fertility Awareness Mastery Charting Workbook? It is the first fully customizable paper charting workbook of its kind, available in both Fahrenheit and Celsius editions. Click here to grab your copy today!

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Would you rather listen to the audiobook version of The Fifth Vital Sign? 🎧 Listen here!