Whatever you decide, remember that sleep training baby is different for everyone. You’ll always hear about a baby who was able to sleep through the night from day one, but don’t expect overnight miracles. So how long does sleep training take? Experts say most strategies will take a week or longer to implement, and sticking them out is key to making them work.
In the first several weeks of life, babies are hungry at night, leading to an apparent reversal of day and night and erratic sleep patterns. Fortunately, this usually resolves by about 3 weeks of age, after which your child settles into a three- or four-hour cycle, typically following a pattern of waking, feeding and sleeping. At this point, exposing your baby to natural light during the day can help encourage longer periods of daytime wakefulness and more sleep at night.
It’s okay if you’re not ready. You aren’t missing out on sleep training if you skip it at 4 months: You truly can start sleep training at any age, even in the toddler years, although experts say it’s smart to be aware of developmental milestones and adjust baby’s sleep schedule accordingly. For example, the week baby learns to walk may be tough to implement a sleep-training schedule, and even a sleep-trained baby may see a regression simply because he’s going through such a developmental shift.