It's a...

BOY!

These ultrasounds look much better in person, so you may need to use your imagination. The top two are our proof that it is a boy. His bottom is on the left and his two legs are extending out to the right. Between them is our proof. The bottom pictures are of the head on the left and the abdomen on the right. The left picture is a profile of his face where the right one is the back of his head (I think).