baby sleep

I don't think it's harmful unless of course you're rocking really vigorously as that would increase the risk of the Shaken Baby Syndrome. I think it would only get the child used to the idea of being rock to sleep. In my opinion, rocking a newborn to sleep works pretty effectively because it reminds then of being in your womb and gives them a sense of security and familiarity. However, over time, your child would constantly need to be rock to sleep and as he gets heavier, it would be very hard on you.