Sorry to be repetitive but I saw a post earlier today or possibly yesterday about mamas saying they could see hair on their LO's 3D ultrasounds. We've had growth u/s every 3 to 4 weeks... and they were always kind enough to print out 3D pictures for us too. I noticed the top of my little guy's head is darker, but I can't quite tell if it's hair ? My OB said you CAN'T see hair on a 3D u/s... so now I'm confused and I'm just wondering what anyone else thinks ! Feel free to share pics of your 3D u/s if you can see your LO's hair... just because i'm curious ! Also- if you do have one that seems to have a ton of hair did you have heartburn all along like the old wives tail suggests ?