I am on my first cycle of injectables, I am on follistim days 3-7 I did 33.3iu went Saturday for an u/s but my follicles weren't ready. Went up to 50iu for days 10&11 and u/s today showed I have 4 follicles 15,13,12&11, they up'd my dose to 75iu for tonight ( day 12 and tomorrow day 13) I go back on Friday for another u/s. Hoping when I go Friday the follicles will be ready and I can trigger that night. They told me that its a good thing that its taking a little longer because its giving the endometrial lining time to thicken up. Good luck with your injections, they aren't bad at all.