I just had my anatomy scan at 21 weeks- we got a blood test done at 9 weeks saying boy. ( I did end up having twins at some point, but at 8 week ultrasound just saw an empty 2nd sac) today’s ultrasound done at hospital they weren’t sure! Baby was down and crossing legs (lol, of course) but the Dr who came in mentioned something about a leg bone being different for boys or girls? Has this happened to anyone?! I go back in 2 weeks to hopefully see baby fully. They did have me empty my bladder, then walk around my room for 5 minutes & turn to sides.