She sent just the profiles. With the other shots, you need someone to point out landmarks. At least, these LOOK like babies.
The only parts that I recognized, in the other ones, were the spinal columns and ribs. We're taking the tech's word, that they're both girls. Of course, boys ARE kind of obvious, aren't they?
I see that everyone is commenting on how clear they are, but I did some work on one of them to enhance it even further and you can really see lots more detail in this version.