Yay, that's so exciting!
Ya know legs crossed usually = girl! I have known several people who have gone for gender scans and their baby had its legs crossed and it ended up being a girl! I think girls are shyer and boys just bare it all!
Looks like one of your pictures is the right angle to look for the 'angle of the dangle' - since learning about that, I think 90% of the people who have gone by that have been right! (the 2nd pic looks like it might have what you need, but it is cut off in the photo)
DS Sawyer 4/1/06
DD Payton too beautiful for this earth, born silently 7/19/09 at 33 wks
DS Greyson 6/29/11