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Progesterone in Pregnancy
What Level Means
As mentioned above, a level of 5 indicates some kind of ovulatory activity, though most doctors want to see a level over 10 on unmedicated cycles, and over 15 with medications. There is no mid-luteal level that predicts pregnancy.
Average is about 20 at 4 weeks LMP, and 40 at 14 weeks LMP. It is important to note that while a higher progesterone level corresponds with higher pregnancy success rates, one cannot fully predict outcome based on progesterone levels. Progesterone supplementation is unlikely to help if started after a positive pregnancy test.
Average is 40 at beginning, 90 at end.
Usually peaks at about 175.
Excellent graph at http://repro-med.net/papers/progest.html.