How do I sleep train my baby?
First of all, rest assured there is no need to sleep train a baby. All babies/children will eventually sleep through the night when they are developmentally ready.
Parents can use many different strategies to help their baby sleep longer stretches when it is healthy to do so (weight and growth). It does not have to be simply leaving them to “cry it out” or waiting it out. The strategy you use will depend on your values and your child’s sleep temperament. Some babies can settle themselves with minimal intervention; other children need more assistance.
Any kind of formal sleep coaching should wait until at least six months old when a baby’s brain development is more mature and the risk of SIDS (sudden infant death syndrome) decreases.
Introduction to sleep coaching by Aidan Black-Allen
When to consider sleep coaching by Aidan Black-Allen
Introduction to crib sleep by Aidan Black-Allen