Emily's response was this: "Well, first you sleep with God a bit. And then the baby falls into a parachute and falls into the mommy's tummy". I thought this was hysterical. I don't know where the first part comes from, but I'm pretty sure the second part comes from the movie Dumbo, where the stork delivers the babies and they float down from the sky.
Here is E and our dog S, who grew by 40% while we were on vacation.