A.R.
We tried CIO twice (once at 9 months and again at 14 months). Despite being consistent for several weeks both times, it only made matters worse. Our son started fighting bed times, was getting up multiple times over night and his naps were shot all to pieces. Basically his sleeping got steadily worse. So far we are the only people we know who had bad results from CIO so maybe we were doing something wrong. At any rate for us we discovered what Margaret K. mentions. Our little guy just seemed to need a little comfort and then he was right back to sleep. My husband did one thing (patting on the back with soothing humming) and I did another (picking up and gently swaying) BUT we were both consistent when it was our turn to go in there. After a couple of nights our son was getting up less and then after a week he was sleeping through the night (10-12 hours). We did have to revisit the issue at 14 months but the comfort method worked for us again. We each noticed we had to go in the nursery calmly. If you went in there annoyed for being woken up for the umpteenth time that night, then it made matters worse since it seemed our son picked up on the foul mood and was harder to settle. As far as naps our pediatrician took the stance of do whatever it takes to get the naps in. If you find your child sleeps in the stroller while walking, then do that. The pediatrician's argument was the focus should be on establishing the pattern of napping. Later on you can slowly remove the crutches/aids you use to achieve the napping. Not a theory for everyone but it did seem to help with our catnapper who averaged 30 minute naps from the very beginning. Good luck whatever you decide and strive for at least a week's worth of consistency before throwing in the towel/trying a different method. The no sleeping phases are tough on everyone but they don't last forever.