Hi clarapist,
We didn't move our LO into his own until he was 6 months old. We waited awhile because (1) we didn't have his room ready yet and DH was always putting it off, DH finished painting, decorating, etc just before DS turned 6 months (2) being a new mom I was afraid I wouldn't hear him cry at night since his room was at the other end of the house (3) our bedroom is really big so we placed his crib in our sitting room so it was almost like he was in his own room. I don't know if my LO would've slept better in his room but I am glad now that we have moved him.