I think on the moniter it is much more clear than in the pictures they give you. I would go with the doctors rather than what you see on these pictures.
I really couldn't see anything in the picture or make anything out. Sorry!
I looked several times and I couldn't see/tell BUT as Latrice said (lol) that is what the doctors are for =) Didn't they point it out to you where they thought it was a boy, so you could clearly explain to your family what was where...Good luck!
To be honest, i cant tell, i guess thats why the doctors get paid the big bucks. Congratsss!!!