The bands on this page
| Result | What it is called here |
|---|---|
| under 100 | Low — relative estrogen dominance |
| 100 to 200 | Borderline |
| 200 to 500 | Optimal luteal balance |
| over 500 | High progesterone relative to E2 |
What goes in, and where each number comes from
Every input is a real test. Follow one to see its normal range, its optimal range and what moves it — the calculation is only as good as the numbers you feed it.
What it costs to actually get these numbers
| The 2 tests on their own | $33.30 |
Prices are Marek Diagnostics with the 10% code already applied, and they are what was filed when this page was built — check the cart. Ordering through these links pays a commission at no cost to you.
What could have moved the measurement, not the marker
A wrong number and a real change look identical on a report. These are the reasons a result here can be an artifact of how the blood was drawn or run, and they are worth ruling out before anything else.
Adequate at pre-menopausal female concentrations and unreliable at low ones.
What to do: If you are male or post-menopausal, order the sensitive assay instead.
Progesterone is near-zero in the follicular phase and peaks about seven days after ovulation. Day 21 is only correct if your cycle is 28 days — in a 35-day cycle, day 21 is before ovulation and will read falsely low.
What to do: Draw 7 days after ovulation, tracked with LH sticks — not on a fixed calendar day.
Secreted in pulses, so even correctly timed values vary considerably.
What to do: One low value with a confirmed LH surge is worth repeating.
Varies severalfold across a normal cycle, so a result without a cycle day attached is close to uninterpretable.
What to do: Note the cycle day. Day 3 for the follicular baseline; seven days after ovulation for the luteal phase.