what are normal E2 levels during stimming?

I went to my RE this morning for b/w and u/s. I am hoping to get an iui later this week. It may have to be canceled since I am responding very/too well to the Follistim. I had 11 measurable follies in 1 ovary and 5 in the other - 8 of them were between 12 and 15. My E2 was only 641. This seemed low to me. I know that the E2 level should be at least 150 for each mature follie. What is normal for the not-quite mature follies?

[BeeHappy76]

I am not sure about the numbers but just wanted to let you know that my RE told me that levels can go way up in the last few days of the cycle. I think your levels sound good. It would only need to double to be 150 for each follie if you have 8, and you might not even want all 8 to be mature if you are doing iui. I think it is definitely possibel for it to double in 2 or 3 days. Good luck!

[BeeHappy76]

Sorry, I meant the last few days before ovulation.