I agree with Roxp84 20mm is the goal. They grow 2mm a day, so hopefully you won't ovulate until cd 13. I haven't had success yet, but I am hoping this cycle I will. I had positive opk on cd 12 and did IUI on cd 13. I am natural, but had a follie at 21 and my lining was 11.7. How is your lining?
for best results u want them to be at, at least 20mm
they will keep growing till u ovulate.