With DS we didn't start CDing until he was 3 months. It was my intention to do so earlier but we received so many sposies as gifts that we decided to use them and waited until DS went up to size medium diapers.
I just got a bfp the other day and am 98% sure that I want to CD in the newborn stage, the hospital even. But DH is wary of the meconium and just the general frequency of newborn changes. DS will only be 2.5 so he will probably still be in diapers too. I'm a SAHM so I can do a load every day if need be but I might underestimating the complexities of adjusting to a second child.