Hi. Just been for 20week scan and a bit confused. After reading forums and talking to othe people I know they said the scan take about 40 mins. That the sonographer looks at everything 3 times. At my scan I was in for 10 mins (ichecked the clock) and she looked at everything once. My mw told me I'd have extra checks too due to a med condition. This didn't happen and when I asked she said it was against protocol!! Very confused about whether the scan I had was as thorough as it was meant to be!!