how fast do follicles grow?

Hi everyone,

I was wondering how fast your follicles can grow per day?? my 2nd scan showed that yes they are growing - looks like i had 12 follicles but only 9 are growing, 3 are still only 10mm - so the nine are ranging from 14 to 18mm... and one more Gonal F injection tonight... and EC due Wednesday eeek! all going well...
Of course i am hoping and praying that i get as many mature good eggs in hope for fertilisation , therefore more chances and those other 3 maybe survive and grow too!!
Does drinking loads of water good for you? someone told me that to make sure you dont get dehydrated and that water can help. that right????