Your baby’s 4 month sleep regression: Why it happens and how to survive it

Just as you were starting to feel like you were getting a handle on this sleeping baby situation, your sweet newborn decides to change thing up on you right as you approach the 4 month mark. This is fondly (or dreadfully) referred to as the 4 month sleep regression. While some have heard of it before it afflicts their family, others are in denial that it will happen to their already sleeping champ of a baby, and other families are caught completely off guard and can’t figure out what they have done wrong. Regardless of the many emotions that surface when your baby enters this phase, it is normal and survivable although undeniably painful at the time.

What is the 4 month sleep regression?

This time period is often a rocky one due to a variety of events that seem to happen simultaneously. Most importantly, this is the moment of time when your baby has a significant “burst” of developmental awareness. This means that some babies (although not very alert babies) for the first several months of life are not very interested in things that are going on around them other then probably the sound of their mother’s voice and whether they are being fed. Their world is rather limited to the immediate vicinity. As they move into this 4 month period, they suddenly become aware that there is an entire exciting world all around that they want to engage with and investigate. When everything around you is so stimulating, it can certainly make it hard to sleep. This means that your baby is likely to become very distractible at this point in time. Remember the days of endless cluster feeding when you could catch up on all of your Netflix marathons and your baby was none the wiser? Now, you turn on the TV as you sit down for a feeding and suddenly your baby cranes his neck to see the screen too, to the detriment of the feeding. Or you try to feed your baby in a public place or where your other children or even the dog are running around and forget it, not going to happen. Everything else is way to interesting to spend precious moments eating.

For many babies, there is also a growth spurt at this time. While growth spurts are hard to predict and there are several of them, especially in the first 6 months of life, many babies will begin eating more around this 4 month mark. This can certainly account for increased night wakings and the reluctance on your child’s part to go back to sleep without a feeding.

As your baby moves out of their 4th trimester (that initial 3 months after birth when he is adjusting to the world out of utero and you may be still helping him simulate that in utero experience with your 5 Ss –sucking, swaddling, shushing, side lying and swinging), many of the tricks you might have used in those early months may stop working. While this can be frustrating because it means that you have less ability to soothe your baby to sleep, it is a sign that your child is growing and developing and needs less intervention from you in order to soothe. This is not to say that all babies are ready to soothe independently at this stage but that this skill is starting to become more developed.

Lastly, some babies like to learn new tricks at this time such as rolling from their backs to their bellies. It is likely that if your child is doing this when they are not in their sleeping space, you will have some advance warning that they are capable of rolling back to belly and are no longer swaddling, as this can be dangerous. If your previously sleeping baby suddenly wakes up in the middle of the night and finds himself on his belly, he is likely to wake up mad and need some help getting comfortable again in order to back to sleep.

When does this regression typically happen and how long does it last?

On average, I find most parents report that they begin noticing changes in their babies around 15 weeks (for babies born prematurely, this would be 15 weeks adjusted). Not all regressions happen to all babies so it is possible to get through this period of time and not notice a significant difference in your child’s sleep. On average, I find that the regression lasts anywhere from 2-4 weeks. If it is not resolving by 4 weeks and especially if your baby is beyond 18 weeks, it may make sense to start making some changes because this is an indication that your child might be ready to be more independent with their sleeping.

How do we survive the 4 month sleep regression?

Your baby is in the midst of big changes! This is a good thing because it means that your baby is growing and developing. At this time, your baby’s brain is starting to cycle in and out of stages of sleep just like the adult brain which means that your baby is starting to notice that there may be a difference between what happens when he is falling asleep at bedtime (for example: he is held to sleep, nursed/bottle fed, rocked or bounced to sleep) and what happens when he now goes through those newly developed sleep cycles. If he went into his sleeping space asleep, he is going to be more likely to wake at when the next sleep cycle occurs.

During this time, there is going to be a fair amount of survival that needs to happen. This is a tough time for your baby too as his brain is growing rapidly and the world around him is quickly expanding. It is fine to do whatever you need to do to meet his needs. Many times a day, I tell parents that there is nothing that they are going to do regarding their baby’s sleep in the first 6 months that is going to cause a long term problem (and even then, it can all be changed, there are just varying degrees of how hard that process can be). Please keep in mind that he may be in a growth spurt so he is likely to have an increased need for nutrition so feedings may be more necessary then they might have been a few weeks ago. You may need to be a bit creative about how your are helping your baby go to sleep during this time as things that worked in the past may not work as well at this point (sadly, this is often the point when those 5 Ss stop working so well). Ensuring that your baby is not overtired will help him sleep more easily so watch for sleepy cues and try to get him down before he is overtired.   This may also be the time when you have a harder time convincing your baby to sleep when you are out and about because of all the stimulation that the outside world is now bringing in. If your baby will still sleep while you are out, it may be helpful to cover the carseat or carrier to reduce some of this stimulation.

How to we get out of this regression?

Babies are not born with the ability to soothe themselves to sleep. Some are better at this then others from younger ages, but when this happens is often based on your child’s temperament. Babies with easier temperaments can often start to soothe themselves and fall asleep independently starting at 8 weeks of age. Please note, this is not through sleep training. This refers to babies who can be put down awake in a sleeping space and, after a brief period of rocking themselves side to side, lifting their legs up and dropping them down—soothing behaviors—fall asleep on their own without needing a sleep crutch. If this is happening prior to the 4 month regression, when you get to the other side, sleep can often fall back into place as your child has the skills he needs to be a great sleeper from here on out.

If your baby goes into his sleeping space asleep at bedtime, the 4 month regression can often bring about wakings every 2 hours (or more!) throughout the night and he may be very hard to soothe at some points. I typically tell parents that if you have come through what is a usual point in time when the regression should be over (about 18 weeks) and your baby’s sleep is still very challenging, this can be the point in time when it may make sense to start to work on developing some improved sleep skills. This will likely involve some sleep training. Sleep training is not something you ever have to do if it is not in keeping with your parenting comfort zone or it may be something you feel would be better for your child if you held off until 6 months. I often find, however, that when parents are going through a circus act of tricks to convince their baby to go to sleep and none of them are really working, it can be because your child is telling you that he is ready to do some of the work himself.

Not sure if your baby is in the midst of their 4 month sleep regression, feel free to contact me for your free 15 minute phone consultation.

Taming toddler sleep shenanigans

Ahh toddlerhood…What a wonderful time! Wait, who am I kidding? Any parent of a toddler will tell you that this can be a very challenging time for both children and parents alike. It is an incredible combination of your child learning that he is a unique and individual being with his own set of likes… Continue Reading

Keeping sleep on track with grandparent visitors

Just when you thought you had all of your child’s sleep challenges worked out, here come the grandparents for a visit. While grandparents mean well and are absolutely fulfilling their grandparently duty by spoiling their grandchildren, I believe it was Dr. Marc Weissbluth who called grandparents the “enemy of sleep.” Make no mistake, they, of… Continue Reading

Toddler transitions: 12 to 24 month sleep

Toddlerhood often presents a whole new set of sleep challenges for children and their parents.  I often tell parents that up until about 1, parenting is largely about management.  Gaining some semblance of control over the peeing, pooping, spit up, sleep, etc.   Once your child turns one and begins toddling as well as really… Continue Reading

Toddler transitions: 2 naps to 1

Just when you thought you had this whole child sleep thing figured out, your toddler goes and changes things on you. So frustrating! By about 9 months, most children are taking two naps but as they move closer to sometimes a year and most often 15-18 months, they will begin to only need one nap.… Continue Reading