On the bottom left is Baby's belly. Follow that up diagonally and there's his little round chin and then a big beautiful pair of lips that he's got all pushed out and his nose is more in the shade. His arm is on the right, over the left side of his face.
He's had his arm up since the beginning, which is actually really sweet because I tend to do that a lot. He'll probably come out like that, making me work harder in delivery!