P.G.
I have no idea what the doc was talking about because logically, what does swaddling have to do with development? The baby is asleep. Swaddling simulates the comfort of the womb, so I would think it helps development. Babies have a startle reflex that wakes them up, so being swaddled keeps them from scaring themselves. Also, when the baby is strong enough, they get themselves out of the swaddle. When he doesn't need/want it anymore, he'll be able to get out of it. Just keep swaddling, you'll be fine. There are some things that are opinion vs. scientific fact, and I think the swaddling thing is one of them.