What should follicle size be for IVF? I have 12 follies. Sizes range from 17, 16, 15 and 14. The dr is having me trigger tonight for egg retrieval on sat. Is this ok? i thought follies should be in the 20mm range? Am I worried for nothing? I know i have to get better at just trusting my dr but being such a control freak at times, it's hard.