I don't know what it should be but I have low - none so my doc has put me on a progesterone supplement. You take 3 pills a day starting with the day after you ovulate and continue until you menstrate or they will keep you on it through the 8th - 12th week. Some docs may keep you on longer but after a certain point your body decreases naturally the amount it produces during the pregnancy.
If you are on fertility drugs (eg,in this case, Clomid) - they want you over a 15. However, if you are 'normal' and not on drugs, the normal range is antyhing over a 5.
So a 10 is really good if you aren't on meds, but low if you are. HTH- Anne
10 is the bare minimum that it takes to support a pregnancy. If it drops any you won't be able to support a pregnancy. You may want to ask about progesterone suppositories or pills. The shots are painful and the suppositories are best absorbed by the body. If you continue to have low levels you may want to ask your doctor about Clomide to help raise the level. Also ask about your estrogen levels. Low estrogen can lead to low progesterone. Also low hormone levels suggest your follicules may not mature enough to create a fetus. Ask your doctor about all this and if it pertains to you.