Thank you for your query.
is done in order to monitor the serial growth of the ovarian follicles ( eggs ) and to document whether ovulation ( egg rupture ) occurred or not.
In your case, just based on the reports of day 11, and the one later ( which has not been clearly typed ), one cannot give you information.
Normally, the follicle grows by 1 - 2 mm per day, till it reaches a size of 20 mm atleast by day 14 ( in a normal menstrual cycle ) when it should spontaneously rupture.
So you definitely need the further 3 scans as advised by your doctor in order to confirm whether proper growth and ovulation occurrred.