I have my 20 Week scan on 14th December Just wanted to know how any ladies who have been for theirs how they managed to drink 1 litre of water 1 hour before the scan and managed not to pee!! I can't imagine how I'm going to even drink that much an hour before, let alone hold on to it! If the appointment is an hour late which the 12 Week scan was, I'll have wet the floor!! Also, do you take a urine sample to the 20 Week scan??