AllAccessAndy

That someone else used to be John Mulaney (who does great standup btw) who said that he was sometimes rewriting the jokes up until minutes before the sketch aired to catch Hader off guard

People with Down obviously have the various facial characteristics to some degree, but they can vary quite a bit. Add to this the fact that new born babies are all really weird looking and I'm not at all surprised that OP wouldn't realize that his daughter had Down right away. My cousin with Down syndrome expressed very little of the common facial characteristics when he was younger. For at least the first 6 months or so, I would doubt a stranger looking at him would have even thought he might have Down syndrome.