I have my 20 week scan tomorrow and was wondering if I need to do any prep before the scan. I remember the last scan I had it was a disaster because I wasn't told I needed a full bladder so the quality of the scan was so poor. I don't want to experience the same problems again, the Hospital have been really bad in guiding and advising and I don't want to face the same issue tomorrow. I want the scan to be better and tomorrow, please can someone advise me on whether I would need to a full bladder again and can I eat before I have the scan or should I go on an empty stomach.