First picture I would guess boy. The second picture I feel like it is too zoomed in on the baby to guess accurately. Sorry because obviously that's the one that you really need the guess on lol! Are you going to post to let us know if we were right on the first pic?? :) Oh, and it's based on the position of the placenta, not the position of the baby.
Here is mine from this time around. It's transvaginal at 8 weeks and I had it confirmed with my doctor that what is on the right of the pic when you are looking at it straight on, is actually the left side of my body. So for me, I'm guessing girl (assuming that it isn't super zoomed in on the baby) and hoping girl too! I will know for sure in about 3 weeks so I will update then! If anyone has any guesses, I'll take them! :)