The less active, the better in my opinion. It took an hour and a half to get all the measurements because my son was SO active.

Honestly don't do anything lol...I ate a small snack and drank some juice and my child was so active that they couldn't get all they needed. We had to go back and that time I ate and drank nothing for an hour before the appointment and he was awake but not super active so they got what they needed. Same with my 3D ultrasound...I was told to drink juice before. He moved so much that all my photos were blurry...But all babies are different ☺️

it has been a while since I've had one done. And with twins it maybe be harder. @mommychina I'm have g mine next week at 20 weeks

I was told to drink 32 oz of water 2-3 hrs before so my bladder would be full.

but it was just a simple ultrasound not the anatomy scan I don't have that until 4 weeks

I tried giving my baby some water and instead she or he gave me attitude next time I'm sending hot wings

I would maybe have a snack to wake baby up but just know when they are moving all over like mine did it's also hard to get measurements because they just don't stay still lol...I have to go back and have it done again and that time she didn't wanna be bothered lol and wanted to sleep and so it was hard to see the heart lol. my baby was stubborn lol.