I had my progesterone levels checked on CD 21 of my last cycle. I was 3 dpo so from everything I've read this is early. Typical tests are at 7 dpo. My level came back at 7.52 which indicates that I did indeed ovulate, but is considered to be low (from what I've read over 10 indicates a level to support pregnancy). I'm wondering if progesterone would have increased if I had been checked at 7 dpo. Is it more effective to use progesterone orally or in vaginal suppositories?