This is all I have found so far. Do you have any previous cycles to compair it too? I think 46 sounds great.

Progesterone in Pregnancy

When Normal Values What Level Means
Mid-Luteal Phase 5+ ng/ml 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.

First Trimester 10-90 ng/ml 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.

Second Trimester 25-90 ng/ml Average is 40 at beginning, 90 at end.

Third Trimester 49-423 ng/ml Usually peaks at about 175.