Anybody know much about what the levels of a day 21 progesterone mean? I've been getting mine checked for the last few months. Last month the level was 15 when I ovulated on day 15 and the month before that was 7 when I ovulated on day 18. They thought the 7 was probably really okay even though it seemed low because I ovulated later. This time though with my first cycle of Clomid it was 37! I don't know what I was expecting but that seems awesome. The nurse I talked to at my doctor's office sounded all excited for me and said she sure hoped we DTD all around that time (which we did of course). Does this mean that my chances of being pregnant are higher? Or is it just a better indication of proper ovulation? Thanks!