In Kim West’s book, Good Night, Sleep Tight, she write about choosing the right time to begin sleep training. It does not matter if your baby is a new born or two years old. You must make sure that when you begin sleep training that you will not have a lot of disruptions or events planned. She recommends you block off 3 weeks and not have any plans, trips, or visitors that will disrupt your sleep training and routine that you are about to establish with your child. For instance, you would not want to start sleep training if it was the Christmas season and you knew there would be visitors or parties planned that would throw off your routine and planned sleep training. Also, do not start sleep training if your child is in the mist of teething, illness, or a growth spurt. They will only hinder your progress.
I have a neighbor with a baby. She started sleep training with her son right before Christmas and New Years. They started to see some improvement in his nighttime sleep but then traveled home (out of state) for the holidays. Of course that right there was a huge disruption to their sleep training. He went to bed late and all his relatives wanted to hold him and possibly keep him up late. When they returned from their trip, their son’s sleep was as poor as it was before they left. They has to start all over with the sleep training.
If you are starting out with a newborn, I recommend that you block out even more time to establish a good routine and sleeping patterns. Give yourself until your child is at least 8 weeks old. Your baby experiences rapid growth during the first 8 weeks and it will take longer for your child to ease into a solid routine. Don’t be come a hermit or stop allowing all guest over, just try to keep the disruptions to your baby’s schedule to a minim. Try to keep you baby at home for all her naps and nighttime sleep.