A reproductive hormone central to the menstrual cycle and early pregnancy.
Progesterone is a hormone that prepares the lining of the uterus for a possible pregnancy and supports early pregnancy. After ovulation, the ovary releases progesterone during the second half of the menstrual cycle. Men and people who are not ovulating have low, steady levels.
Progesterone is most often measured to confirm that ovulation has happened and to assess the luteal phase. It helps when looking into cycle problems, fertility, and recurrent miscarriage.
A clear rise in the second half of the cycle, often tested around day 21 in a 28-day cycle, suggests ovulation occurred. Low levels at that point suggest ovulation did not happen or the luteal phase is short.
Aniva reads your result against research-backed ranges, not just the lab's wide normal. The reference shown below is specific to this biomarker.
Strongly cycle and sex dependent. Guidance only and assay dependent. Ranges vary by lab.
| Group or phase | Reference range |
|---|---|
| Women, follicular phase | below ~3.2 nmol/L |
| Women, luteal phase | ~10 to 90 nmol/L |
| Women, postmenopausal | below ~2.0 nmol/L |
| Men | below ~2.0 nmol/L |
Source: LOINC 2839-9. Confirm against your own laboratory's range.
Your result, timed to your cycle, shows whether and how well you ovulated. It supports work on irregular cycles, trouble conceiving, and luteal phase concerns.
Timing within the cycle is critical, since levels rise and fall sharply. Progesterone medication and hormonal therapies change results. High-dose biotin supplements can interfere with certain assays.
Best read together with estradiol, LH, and FSH, and with the timing of ovulation in your cycle.
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