Upcoming detailed scan @ 20 weeks 4 days.

Hi! In a week's time, i'm going for my Detailed Scan and to find out the Gender @ 20 weeks 4 days. Do i have to go with full bladder or empty bladder to have a clear view of the scan? Or any other tips & advices to ensure that my baby will show his/her gender clearly? #firstbaby #advicepls