Jade
It can take between 11-16 days of injections to get the follies to a size big enough to harvest. They will probably want the lead follie to be around 20-22mm at harvest and they grow about 2mm a day at this stage. That said - I always seemed to have smaller follies than that when they went for pick up.

Your clinic is right and you probably will find that you have more follies on Monday. At your stage, numbers can increase dramatically over a weekend. And I notice that you have PCOS on the right ovary so that makes it even MORE likely there'll be an increase. And if there isn't, don't panic - celebrate - it means you are making 8 top quality follicles instead.