What is a good size follicle?

I went to the RE today to have an u/s done to see if I was ready for my trigger shot, but my follicles were not big enough.  Most of my follicles were 3mm I have one that was 6.8mm and anotgher that was 6.3 mm and yet another one that was 8.4 mm.  I should have asked while I was there, but I never think of the questions while I am there, but what is the preferred size for a follicle?

[Holly7]

The last 2 trigger shots I had one month one was 25mm
and last month I had 2 one at 18mm and one at 20mm
My doc told me he'd only give me the trigger if I was at least 18mm.. Hope that helps..

[javajess]

my RE wanted my follicles 18-22mm

[danielle0817]

Thanks for the info!

[danielle0817]

They have me going back on Friday for another u/s so we will see what happens

[Want2BeMama]

i got a trigger shot yesterday and my follicle was 22mm..you could problably wait an extra couple days and go back and get another u/s i was told by my RE that a follicle grows 2mm a day!! good luck!

[shayla1]

I trigger when mine are 19-20

[nana450]

I went for my blood test this morning I had the trigger shot on Jan the 12th . my doctor said I had a total of four follicle's three on the right at 19mm and one on the left at 23.9 mm .... hope that helps .....

[Peanut600]

I had my second IUI using Femara and I only had one muture folicle 18mm. Three pills for five days hopefully god blessed me this time what do you think my chances are.