The cry-it-out method (CIO) is a sleep training strategy to get your baby sleep on their own. You lay them down and let them cry until they fall asleep. There are a number of variations you can consider when trying it out and that decision can be hard on parents. But studies show that it can help babies sleep through the night. Also, there’s no long-term negative effects on your baby behavior or attachment.
Just be sure to check with your pediatrician that’s all are good before you begin any sleep training.
What Is the Cry-It-Out (CIO) Sleep Training Method for Babies?
The cry-it-out method teaches your baby to fall asleep by themselves. You place your baby in their crib once they feel sleepy but awake. Rather than immediately coming in at every wail, the CIO also enables your baby to practice self-soothing. It is important to distinguish this from other sleep behaviors, such as when do newborns cry in their sleep, which can sometimes happen without them being fully awake.
The aim isn’t to be mean. It’s to help them develop self-soothing skills that may lead to better sleep over time. You just make sure your baby is fed and comfortable and safe before bedtime.
Since the routine is changing, there’s often crying at the beginning, but that’s not the objective. Studies indicate the method can work and be safe for lots of families. But it might not feel right to everyone. Therefore, parents need to keep a close eye on their baby and attend when necessary.
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Cio, Ferber, Pick-Up/Put-Down Methods: What’s the Difference?
These are all sleep training methods, but they work in different ways.
- Cry it Out (CIO)
Lay your baby in their own crib when they are awake to let them sleep by themselves. Yes they’ll cry, but you’ll be able to help them develop their ability to fall asleep on their own without assistance. Most babies adjust within just a few nights to a week, based on their age and personality.
- Ferber Method (Graduated Extinction)
This is just like CIO. But you'll visit your baby at intervals rather than ignoring them completely. You can begin with short periods (3, 5, 10 minutes). Then, extend your waiting. As a result, your baby will fall asleep on their own by 3-7 nights.
- Pick-Up/Put-Down
It is gentler. When your baby cries, pick them up to calm then put them back before she’s asleep. You do this over and over again until your baby is able to fall asleep alone.
CIO and Ferber can work faster but involve more crying, while Pick-Up/Put-Down is gentler but takes longer. Pick the best depends on your baby’s needs and what feels right.
Pros & Cons of the Cry-It-Out Method
Pros :
- CIO is effective in reducing bedtime fights and night wakings. It works well when done fully or gradually.
- This method shows fast results. Babies will lay asleep on their own in just a few days.
- You can stop bedtime crying quickly. When this method is done right, bedtime battles improve quickly.
Cons:
- Not responding to your baby’s cries can be stressful, and the abrupt changes in routine throw for a loop both you and your baby. At first, sleep may even get worse, with more interruptions at night, increased clinginess, and difficulties with naps before it gets better.
- Other researchers warn that cry-it-out methods can have risks. They cry more in other situations and may have a higher risk of SIDS as they aren’t checked regularly. Understanding the baby cry meaning can help parents feel more confident in deciding when to intervene and when to wait.
Is the Cry-It-Out Method Bad for Babies?
There is no scientific evidence that the cry-it-out method is harmful either in the short term or the long term. Studies have also shown that babies who are sleep trained can be more secure. They also become less fussy and sleep better as time goes on, and no negative effects have been found.
Still, some infants may become extremely inconsolable. So parents should keep an eye on their baby and ensure the infant is safe and comfortable. It's baby video monitor that help view them while they learn to sleep on their own.
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When Can You Start the Cry-It-Out Method?
Most professionals say it's safe to start the cry-it-out method when your baby is roughly 5-6 months old. Babies are not usually able to sleep alone just yet. Make sure to check with your pediatrician first to make sure your baby is ready and that you do not need to breastfeed at night.
Is Your Baby Ready for Sleep Training with the CIO Method?
CIO sleep training can start as long as they have a more regular sleeping schedule, need less help to fall asleep, and take longer between feeds. Ensure that your baby is healthy and comfortable.
How to Do the Cry-It-Out Method

- Stick to an organized bedtime routine each night. Start to look for signs when they’re tired. They yawn, rub their eyes, become fussy, or look off.
- Keep your bedtime routine calm. Take a bath, change the diaper, put on jammies, feed for the last time, read a book, or sing a lullaby.
- Place your baby in a wider crib when he or she is drowsy but awake. Tell goodnight and leave the room.
- Give your baby a chance to go back to sleep on his own if he cries or wakes up in the middle of the night. Only go in if you suspect something’s wrong. Keep the lights dim, your voices low, and don’t pick them up unless you really have to. A video monitor can help you watch them minute by minute. If you notice your baby crying in their sleep, it might be part of their natural sleep cycle transition, and they may settle themselves without help.
- Start the day at the same time each morning (7 a.m.) even if the night was difficult.
- Stay consistent. Follow the same routine every night to help your baby learn faster. They can improve within a few nights to a week.
- Be consistent. The baby also learns quicker by having the same routine every night. Most babies get better in a few nights to a week.
How Long Should You Let Your Baby Cry It Out?
Every baby is different. Some babies cry for a few minutes and calm down quickly and others for a longer time. The first nights are the hardest and then crying decreases as he gets used to the new routine. It also makes a faster process thanks to the consistency.
Quit responding when your baby wakes later at night (at least until morning). Peek and no pick or stimulate him. In case CIO is not working after a week, rest and resume or change sleep training approach. You can also consult your pediatrician in case there is something that can be ruled out.
Tips for Using the Cry-It-Out Method

- Develop a schedule. Keep a well-maintained schedule for bedtime and daytime, including naps.
- Get the assistance of your partner, family, or friend. Make sure that they are all ready to stick to the plan and support each other.
- Choose the right timing. Begin when your environment is quiet and not stressful. Don’t start on a busy or eventful day.
- Be consistent. Stick to your plan for 6 days or more. Surrendering immediately can destroy progress.
- Anticipate some lost sleep. Begin on a night when losing a bit of sleep wouldn't be a big deal.
- Handle tough nights. It’s hard to hear your baby crying. Change rooms, turn on music or white noise, and keep in mind your end goal: better sleep for you and your baby.
- Make adjustments if necessary. If CIO seems too extreme, alternate with a more gentle approach such as the Ferber method.
- Expect to make mistakes. Babies can regress when they are sick, teething or travelling. That’s normal. So, stay consistent and patient.
When to Stop or Modify the Cry-It-Out Method
If the cry-it-out method seems too extreme, there’s a softer alternative. Do the graduated extinction or the Ferber method. You take increasingly longer intervals before attending to your baby’s cries. Start with a few minutes the first night. Then, increase the time gradually over the next few nights. This enables your baby to learn to self-soothe under the sound mind of being comforted.
What If Your Baby Just Won’t Sleep?
A real battle starts at bedtime while your baby has a hard time falling asleep. If sleep difficulties begin to take a toll on your baby, consult your pediatrician or a pediatric sleep expert.
FAQs
Is It Ok to Let a Baby Cry?
Yes. If your baby is healthy, fed, clean, and comfortable, it’s good. The CIO approach isn't about dismissing your toddler needs. It is about teaching them how to calm themselves. Whenever in doubt, check if your infant is hurt, ill, or more agitated than they were moments ago.
How Long Is Too Long to Let a Baby "Cry It Out"?
There’s no exact rule. You may allow your child to cry until he falls asleep. But always respond if you suspect something is wrong. Follow your intuition.
Does the Cry-It-Out Method Work for Naps?
Yes, it can work for naps. But it might take longer in the beginning. Some babies cry more during daytime naps. So, consistency and a calming environment really can help with teaching babies to sleep on their own.
Is There a Gentler Version of the Cry-It-Out Method?
Yes. The graduated extinction or Ferber method. You will wait longer before responding to your baby’s cries. You’ll help them learn to self-soothe while still feeling comforted.