Progesterone
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Progesterone changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Progesterone?
A hormone, made mainly by the ovaries, that prepares the uterus for pregnancy and helps support it.
Progesterone rises in the second half of the menstrual cycle after an ovary releases an egg, and it climbs further during pregnancy. In people who menstruate, a rise can be associated with ovulation having occurred, and low levels can be associated with cycles where ovulation did not happen or with early-pregnancy concerns. Because levels change a lot across the cycle and pregnancy, timing matters and results are read in that context. Levels are naturally very low in men and in people who are not pregnant and not near ovulation.
What to know about Progesterone
Understanding Progesterone means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.