11-14 antral follicles or above per ovary plus 1 dominate one is considered normal when not on fertility treatment up to 20 on each ovary is still good and usually the younger women will have more my FS said if you have to many antral follicles like 20+ on each ovary it can be a sign of pcos.
I had 14 follicles on day 4 of my natural cycle and one dominate one when i did an IVF cycle i would have about 25-30 follies and i was told that was really good.
Hope that helps.