
The Cry-It-Out (CIO) method is one of the most well-known and debated sleep training techniques. It aims to help babies learn how to fall asleep independently by allowing them to self-soothe, even if it means letting them cry for a period of time. This article provides an overview of how the method works, its potential benefits and drawbacks, and what parents should consider before deciding to use it.
The Cry-It-Out method involves placing the baby in their crib while they are drowsy but still awake and allowing them to fall asleep on their own—without being rocked, fed, or soothed by a caregiver. The method allows the baby to cry for set periods of time before a parent checks in briefly, gradually increasing these intervals over several nights. The goal is to teach the baby to self-soothe and develop independent sleep habits.
The CIO method gained popularity in the 1980s with Dr. Richard Ferber's book, “Solve Your Child's Sleep Problems.” His approach, often called "Ferberizing," is a structured form of CIO involving timed check-ins. Over the years, various versions of CIO have emerged, ranging from “extinction” (no check-ins) to “graduated extinction” (increasing wait times).
There is no single approach that works for every family. Most pediatricians agree that CIO is safe for healthy babies over 4 to 6 months of age, as long as it is used consistently and responsibly. However, experts also stress the importance of considering the baby's temperament, parental values, and emotional comfort levels.
Dr. Jodi Mindell, a pediatric sleep expert, notes: “There is no evidence that controlled crying harms infants. It’s important that parents do what feels right for them and their child.”
If the CIO method doesn’t align with your parenting style, consider gentler alternatives such as:
The Cry-It-Out method can be an effective sleep training tool for some families, but it’s not the only option. Every baby is different, and what works for one child may not work for another. The most important factor is that parents feel confident and comfortable with the approach they choose—and that they respond with love, patience, and consistency.