peonies - I didn't really pay much attention to what size and how many follies the nurses decided to measure and count. In my personal experience there wasn't a good enough correlation between the FN follicle count and the FS eggs collection. I used follie count as a rough indication at best. Hormone numbers were better suited to me (but you need one or two stims to learn your correlations).
The time I thought my follies/ovaries looked just the the textbook, with about 6 each side was actually my worst collection (3 mature eggs). Other times my FS has found more mature eggs than the number of follies measured as good at last scan.