Follicle growing but low estrogen

runfast

I am currently in an IUI cycle and I had one follicle that grew to 20, but my estrogen was only 50ish. Doesn't this mean there is no mature egg? I am at a very good RE and wonder why they would still have me trigger and do the IUI if there really isn't much chance. 

Thank you in advance!

tvh1982

Are you on any other medication? Some medication suppress estrogen (like letrazole) so numbers won't be high. 
I found it weird that follicles grow, but estrogen doesn't rise.
Here in Norway they don't check estrogen levels, just the growth of the follicle. If they are 19 you're good to go...

Shopaholic42488

I am the same way! Right now I have 15 follicles but estrogen is only 26

runfast

@Shopaholic42488 have they said why? Are you going to continue with the cycle?
@tvh1982 that's really interesting! Any other differences in Norway? 

tvh1982

Not that I know of...our levels get checked before we start the process of IUI or IVF, and that's the only time.
Triggershots are not common to take, they rather have us ovulating by ourselves. 

Shopaholic42488

@runfast they have not said why, I am going tomorrow for another ultrasound and I will ask. 

runfast

@Shopaholic42488 Ok, good luck. Let me know what they say!

Shopaholic42488

She said she had no idea why. My estrogen still is rising but follies are growing. She WA ts me to decrease to 25 iu follistim and go back thursday