I have ovulated each month I've taken 150 mg. I didn't think it would work since 50 or 100 mg didn't, but I was definitely pleasantly surprised!! My progesterone on 50 and 100 mg was less that 1.5. My first month on 150 mg, my progesterone was 11.27, though my blood was drawn a few days too early- it still showed I ovulated. Last month my progesterone was 30.14.