#asktheexpert- how to break habit of sleep association?? My baby only sleeps if she is held and rocked/bounced for sleep initiation. She is 4 months now.. Can I start sleep training/cry it out method for her? The other methods wasn't very successful(chair method, pick up put down method). Or should I just leave sleep training and hope she will learn to sleep on her own as she grows? At what age she will just close her eyes and go to sleep on her own when tired without fussing or crying??