Progesterone: What Your Result Means
Result guide · Hormones
Content last reviewed 2026-09-12 · Educational information — not medical advice
Quick answer
Progesterone rises after ovulation and supports early pregnancy. Levels near zero are normal in the follicular phase or menopause; a mid-luteal rise confirms ovulation happened.
What is Progesterone?
Progesterone is produced by the ovary after ovulation (by the corpus luteum) and, during pregnancy, by the placenta. It prepares the uterine lining for implantation and maintains pregnancy. The same hormone has different meanings in each phase — interpretation always needs timing.
Typical reference interval: Pre-ovulation: under 1 ng/mL. Mid-luteal (7 days after ovulation): commonly 5–20 ng/mL. First-trimester pregnancy: often 10–50 ng/mL and rising. Post-menopause: under 1 ng/mL. These are broad guides — use your lab's ranges.. Laboratories differ — the interval printed on YOUR report always governs.
If your Progesterone is high
Common reasons Progesterone runs above the reference interval:
- Pregnancy — progesterone rises steadily, especially in the first trimester
- Luteal phase timing — a natural peak 5–9 days after ovulation — expected
- Hormone supplements — progesterone or progestin therapy raises serum levels
- Ovarian cysts — some cysts (especially corpus-luteum cysts) produce progesterone
If your Progesterone is low
Common reasons Progesterone runs below the reference interval:
- Follicular phase or no ovulation — a low value when you have not ovulated is expected — no corpus luteum, no rise
- Menopause — without ovulatory cycles, progesterone stays at baseline
- Failed ovulation in a monitored cycle — a missing luteal rise when ovulation was expected points to an anovulatory cycle
- Pregnancy concern — a low or falling level in confirmed early pregnancy needs prompt clinical review
Symptoms worth knowing
Low progesterone itself is usually silent — the visible sign is irregular or absent cycles if ovulation is not happening. High progesterone (luteal phase or early pregnancy) can cause breast tenderness, bloating, fatigue, and mood shifts, and sleepiness in pregnancy.
What usually happens next
Get your Progesterone checked
These lab tests measure Progesterone directly. Ordering online takes a few minutes and results arrive securely.
We may earn a commission when you order through partner links on the following pages. Educational information here never replaces advice from a qualified healthcare provider.
Panels that include this value
Progesterone appears as one line inside these broader panels — better value than ordering single markers alone:
Related result guides
Frequently asked questions about Progesterone results
When exactly should I test progesterone?
If you have a regular cycle, aim for about 7 days after ovulation (roughly day 21 of a 28-day cycle). The number is only meaningful relative to that timing.
Does low progesterone mean I cannot get pregnant?
Not by itself. Low progesterone usually means ovulation did not occur or the draw was mistimed — the real question is whether you are ovulating at all, which FSH/LH and cycle tracking answer better.
Browse all lab tests
Looking for a specific test instead of a result explanation? Our full catalog covers hundreds of lab tests and panels.