Hmmm...tricky huh!
The second picture looks exactly the same as Toby's scan when we found out he was a boy.
But the first one looks more like cord to me.
I'm a bit dubious about finding out the sex that early anyway, since we were told Toby was a girl at 14 weeks. Back again at 20 weeks and ta-da! He was a boy LOL.
I think if I were you I'd be hanging out for another scan