We had our a/s yesterday and man do we have a stubborn child. LO was curled up in a ball the entire time and refused to move. After walking several laps around the pavilion she finally moved but was turned so we couldn't see anything. They did manage to get all the measurements they needed and everything looks great. The only thing they couldn't do was peak between the legs to verify she's a girl. I'm half tempted to go get an elective this week just to see but they said girl with certainty last time at nearly 19 weeks so probably not.