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Wonder Weeks Chart: How The Wonder Weeks Affect Baby and Toddler Sleep

If you’re a mom in today’s day and age, you’ve no doubt heard about The Wonder Weeks, written by a husband-and-wife team, outlining the 10 “wonder weeks” (which often cause sleep regressions), that all babies go through in the first 20 months of life. The book outlines when and why each “wonder week” happens; it also offers parents insights into how to help their babies navigate each wonder week, and turn it into a leap forward for baby.

Here is how the wonder weeks impact sleep!

Wonder Weeks Chart: How The Wonder Weeks Affect Baby and Toddler Sleep

Week	Name	Description	Impact on Sleep
5 Weeks	Changing Sensations	Your newborn is “waking up”, becoming more alert, and noticing the world around her. This is understandably overwhelming for newborns!	This is when “the witching hour” usually starts – that period of fussiness from about about 5 – 10 or 11 p.m. Be available to cuddle baby often (wearing baby is a great idea at this time); you may also need to feed more frequently in the evening. Baby may also go through a growth spurt at this time. Finally, keep in mind that this wonder week overlaps a bit with the 6 week peak of fussiness.
8-9 Weeks	Patterns	Baby is beginning to recognize and create simple patterns in his world; he’ll practice moving his hands in the same way over and over, or make the same grunting sound again and again.	All this curiosity and alertness can make it hard for baby to settle and fall sleep, so be sure to make your nursery sleep-friendly – it should be dim and quiet. This is also a great time to begin working on simple sleep time routines – start doing the same patterns of events at nap time and bedtime.
12 Weeks	Smooth Transitions	Baby’s movements become smoother and more coordinated; baby also begins to recognize changes in her world, and the patterns of these changes (i.e. every time the dryer buzzer goes off, mom leaves the room).	Baby is getting squirmier at this age, and becoming more active – and that can mean changes to your sleep routine. Your baby may start breaking free of the swaddle. Some parents find that baby’s newfound ability to roll interferes with sleep – baby can roll from back to tummy, but not the other way around. Other parents notice that their babies settle into a semi-regular sleeping and feeding schedule at this age.
15-19 Weeks	Events	Baby is learning to recognize cause and effect, and to predict outcomes (i.e. ‘If I drop this toy, it will fall to the ground, and dad will come and pick it up’).	Welcome to the 4 month sleep regression! If baby’s sleep was predictable up to this point, it may all fall apart now. Continue to work on building consistent sleep routines; this will help baby learn that certain events mean sleep is coming. You may also want to work on identifying any sleep associations baby may have; that will help with sleep training. There’s also another growth spurt that happens around 4 months.
23-26 Weeks	Relationships	Baby begins to perceive distance at this point – the world becomes a much bigger place for her! This may be one reason why many babies begin rolling/crawling at this time.	Separation anxiety may become a problem at nap time and bedtime, since baby now understands that when you leave, you’re far away. This is also a great time to sleep train your baby – work on weaning your baby away from her sleep associations, and on helping her learn to fall asleep independently. Finally, there’s yet another growth spurt that happens around 6 months, for most babies.
33-37 Weeks	Categories	Baby is learning that various things can be grouped together – for example, his blocks may all look different, but he recognizes that they are all blocks. Baby also makes big strides in mobility, learning to crawl well, to pull up to standing, and possibly to take assisted steps.	This Wonder Week coincides with the 8/9/10 month sleep regression. Baby’s sleep may be seriously disrupted, thanks to all his new-found mobility. But baby may also begin to experiment with cause and effect at sleep times – ‘If I cry, what will mom do?’ Your baby will quickly pick up on any patterns, so make sure not to create any new sleep associations at this stage. Finally, if baby is still waking to feed at night at this age, we usually recommend an attempt at night-weaning. (Oh, and P.S. – there is (you guessed!) another growth spurt to watch out for, around 9 months.)
42-46 Weeks	Sequences	Baby begins recognizing the steps involved in simple tasks, like getting dressed, or making lunch. Baby can also apply this to his own tasks – socks have to go on before shoes.	Routines are so key at this stage; most babies love knowing what comes next, so work to continue strengthening your sleep routines. You may find that your baby goes through the brief 12 month sleep regression around this time, and tries to give up her morning nap; we advise that you stick to two naps for now, as most babies this age can’t manage with just one nap.
52-55 Weeks	Programs	Your toddler builds on his understanding of sequences, and starts to learn that there is more than one way (or one “sequence”) to accomplish the same task. This is also when most toddlers start showing strong preferences (i.e. pink socks are great, but green socks are bad).	Welcome to toddlerhood, parents! At this stage, separation anxiety often comes back with a vengeance. You may also start to see some nap time and bedtime resistance at this point, as your toddler is learning to assert his independence and preferences.
61-64 Weeks	Principles	This stage is related to the cause-and-effect breakthrough we saw in the 15-19 week stage, only now, your toddler is learning how to use cause-and-effect to achieve her goals. She is also learning that her actions have certain consequences	It’s time to talk about the D-word, parents – discipline. Your toddler is learning fast how you respond to her actions, so be sure that you are sending the right messages with your responses. This is the time to start establishing boundaries and setting limits for your toddler surrounding sleep, and enforcing them. We often tell parents that at this age, sleep problems are rarely sleep problems – they are discipline problems.
72-76 Weeks	Systems	Your toddler is capable of understanding larger systems now – for instance, she knows that the procedures and expectations at daycare are different than those at home. Your toddler can also change her behavior and actions to suit different situations, which explains why your toddler may be sweet and helpful for the babysitter, but grumpy and whiny for you (which is not at all uncommon, by the way!).	If it hasn’t already, your toddler’s ‘toddler attitude’ may show itself full-force around this time. Continue to enforce your sleep time boundaries and limits. By 17 or 18 months, tantrums are common. Toddler tantrums at bedtime and nap time are especially frustrating – it’s key that you stand firm during these tantrums. Also, watch for the 18 month sleep regression that happens at about this time; it tends to be one of the toughest.

(Chart created by The Baby Sleep Site^®. All views regarding how the Wonder Weeks impact baby and toddler sleep are ours, and are not taken from The Wonder Weeks book. For full information on each Wonder Week, reference the book itself.)

Whew – that’s a lot of information to take in, isn’t it? If you’re struggling to make sense of all this, remember that you don’t have to make sense of it alone. Scroll down and check out ourbaby parenting sleep blog diy resources below, and let us guide you down the path to better baby and toddler sleep!

If you are looking for a more customized solution for your unique situation, and want plenty support along the way, please consider one-on-one baby and toddler sleep consultations. Your consultation package will provide you with the chance to interact one-on-one with a trained sleep consultant, who will create a Personalized Sleep Plan™ for your family and then work to help you implement it at home.

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A better night’s sleep could be just a few clicks away. So don’t wait – download now, and start your journey to better sleep tonight!

Has your baby gone through the Wonder Weeks stage? How has it affected your baby’s sleep? Scroll down to share your story and to hear from other parents just like you!

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If you are tired of wading through stacks of baby sleep books that just aren't working, if you are beyond exhausted and just can't solve your child's sleep problems on your own...than personalized sleep consulting is for you. Our team of expert consultants will create a Personalized Sleep Plan^® just for your family and then support you through every step of implementing your plan. We encourage you to consider our personalized, one-on-one baby and toddler sleep consultation packages if you want to see real, meaningful results now. Your consultation package also includes ample follow-up help, designed to help you troubleshoot problems and tweak your plan as needed.

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Baby Sleep Pattern Charts — A Must-See For All Parents!

By Emily DeJeu

Here at the Baby Sleep Site, we’re not short on sleep-related facts and figures. Nicole, a self-proclaimed “numbers nerd”, can offer our clients all the sleep-related data their hearts could desire! Not all of us are as number-nerdy as Nicole, of course (myself included!), but sometimes, having data helps us understand our babies’ sleep issues, and even helps us come up with solutions to the problems.

Recently, Baby Sleep Site reader Beth E. e-mailed us some information about her own son’s sleep development. Turns out Beth (a Ph.D. Pharmacologist, Neuroscientist, and numbers nerd extraordinaire) had been using a smart phone app* to track her son’s sleep patterns from the time he was three weeks old up until now (at 9 months). And she didn’t just track sleep — she tracked feedings, diapers, medications, etc. As she put it:

“…the app meant the information was always with me for appointments, etc. And if there is one thing I’ve learned, the minute you think you can stop tracking things, the baby gets constipated or some such, the doc asks when was the last bowel movement, and you just don’t know. So, the app means I can log it in and it’s easy peasey!”

Beth says the process of actually tracking her son’s sleeping patterns was very straightforward and easy:

“I ‘check in’ the baby when he falls asleep and ‘check out’ the baby when he wakes up. For me, it has been most useful on the day to day basis so I can easily answer my questions, like, “When, exactly, did he go down for that nap?”, “Was that another 45 minute naplet?” and “Is he really short on sleep today?” For that, the app has been fantastic.”

Along the way, Beth turned her long list of data into a set of graphs, making it easier to see and interpret her son’s sleep patterns. The result of Beth’s work? An incredibly comprehensive, detailed account of how sleep develops in a baby from birth – 9 months! And because we love our readers so much, we want to share this awesome information with you. We know you’ll benefit from it.

Okay. Enough background information. On to the graphs!

Graph #1: Wake and Sleep Times

*Click graph to view a larger version in a new browser window.

This graph tracks the timing of Beth’s baby’s sleep — when he wakes in the morning, when he goes down for his first and second nap, and when he goes to bed. The numbers on the left indicate the time of day (in military hours); the dates along the bottom go week by week, from the time the baby is about 4 months old until recently, when he was 9 months. The red lines on the chart are what we want to focus on — they help us see the “average” for sleep and wake times.

What’s most interesting about this chart, in my opinion, is how much the morning wake times and first nap times correspond to each other. You’ll notice that they move together — when the baby wakes later in the morning, the first nap starts later. Bedtime also follows a smooth pattern, becoming gradually later as the baby gets older.

Even more interesting? The afternoon naps don’t correspond at all, to anything! They’re all over the place. This illustrates what Nicole often tells our clients about babies’ naps and schedules: the morning nap is the most important and the most restorative, while the afternoon nap can vary. If you have an errand to run or a trip to plan, try to do it after the baby’s first nap, if he has more than one.

Nicole’s Note
“The morning nap is the first to establish. It usually, but not always, becomes the most predictable and the easiest to get. The second nap, while some babies sleep better based on the clock, others sleep better based on how long they’ve been awake. Still others will even change their nap time based on how active or busy their morning has been. The interesting thing about this chart is you can see bedtime getting later as baby is getting older and you can see how wildly variable the schedule is when the baby is younger and it becomes more regular as he gets older. This shows that it does get better!”

Graph #2: Sleep Amounts and Duration

*Click graph to view a larger version in a new browser window.

This graph is identical in its set-up to the previous graph, but this one charts the length of Beth’s baby’s naps and nighttime sleep, instead of tracking the time of day the sleep happened. The numbers along the left and right sides (the number on the right are for nap #2) represent total hours. You can look at each of the red lines to see averages for how long the baby’s morning naps, afternoon naps, and nighttime sleeps were.

The take-away from this chart, I think, is the simple fact that a baby’s sleep is a fluctuating thing. This chart illustrates a frustrating phenomenon that I think all of us parents have experienced: a baby who sleeps 10 straight hours one night (or takes 3 beautiful naps one day) is cranky and waking constantly the next. Just when we think, “They’ve got it!”, our babies prove us wrong.

Something else I saw — notice how the morning and afternoon nap lines tend to mirror each other. When the morning nap line dips, the afternoon line spikes, and vice versa. This seems to show that when the baby had a shorter morning nap, he made up for it in the afternoon, but when his morning nap was nice and long, his afternoon nap was shorter.

Nicole’s Note
“This graph supports the fact that a baby’s total sleep in 24 hours will stay relatively constant. Inconsistent babies, especially, may sleep a different amount every day, but the average will stay constant. As a baby gets older, of course, the amount of sleep will decrease, but it should not be abrupt. As you can see, it’s a slow downward slope, but not a sharp dip. Of course, everyone has an ‘off’ day, occasionally, even your baby.”

Graph #3: How Infant Sleep Develops

Those last two graphs are helpful, but it’s this one that caught Nicole’s eye, and made all of us here at the Baby Sleep Site shake our heads in amazement:

*Click graph to view a larger version in a new browser window.

This graph compiles all the data from that last two and shows the times of day when Beth’s baby was awake and asleep, as well as how long each of his “sleeps” lasted. In this graph, white shows all the times the baby was awake, and blue shows all the times he was asleep.

Do you see what we see? Right around the 3.5 month mark (mid-December, for Beth’s baby), the baby begins to settle into a sort of schedule. There starts to be more blue during nighttime hours, and more white during daytime hours. As Beth says,

“One week in December, the whole schedule started appearing…magic!”

Move a little farther to the right, and you’ll notice that around the 6.5 month mark (mid-March, for Beth’s baby), a more consistent naptime schedule develops. At that point, you can see three pretty distinct blue bars, showing the baby’s morning and afternoon naps.

Nicole’s Note
“Although not all babies will develop the same way, of course, this graph is a powerful image that a baby’s sleep in the newborn days can be very erratic and unpredictable. I know this can drive some of us a little crazy. 😉 But, take heart that your baby’s system will mature and patterns can emerge. Routines like Babywise may be too stringent for your baby who isn’t developmentally ready for strict schedules or routines. Sometimes, we need to wait until a baby is older to help guide his schedule.”

So what do we make of this? Well, here’s one fact this graph illustrates in crystal-clear detail: in our opinion and experience with many families, most babies aren’t ready for feeding and sleeping schedules until close to 4 months.”

Here’s another fact we can see laid out in this graph: as a baby grows, his sleep begins to organize as his central nervous system matures. Newborn sleep patterns are often scattered and unpredictable; then, as the baby grows, a more predicable naptime schedule can emerge. You’ll notice that Beth’s baby doesn’t follow a nap schedule perfectly (he is likely somewhat inconsistent), but he seems to have a naptime schedule that’s consistent enough to create the patterns we see on the graph.

Something you should know: Beth’s never done any sleep training with her son. For her baby, these patterns happened naturally. As Beth says,

“I probably could use some guidance on stabilizing the sleep patterns some… but for now I’m a no-cry momma with a little guy who doesn’t know how to take a bottle (so daddy can’t help) and I’ve allowed the nurse-to-sleep pattern. We’ll see if I start asking for help with a sleep package from you guys when I start weaning him in a couple of months!”

Now, let’s make sure we’re all on the same page: am I suggesting that every single baby will follow the exact patterns that Beth’s baby followed? Not at all! If you know much about the Baby Sleep Site at all, you know we believe strongly that there’s no such thing as a “one size fits all” approach to ANYTHING related to your baby.

Am I suggesting that sleep training isn’t necessary, since babies will eventually “figure it out” on their own? Again — not at all! I’d better not be; Nicole might have a thing or two to say about that. 😉 Some babies will begin sleeping through the night on their own and naturally developing their own schedules, without any help from their parents. But plenty of others won’t, and those babies need a little guidance and coaching in order to develop healthy sleep habits.

Here’s what I am suggesting: when it comes to helping your babies sleep well, it can be good to log your baby’s sleep to better understand how they sleep and what their natural sleep patterns might be. Beth’s charts and graphs are unique to her baby and your baby’s sleep patterns will be unique too. This might mean your baby’s sleep could be (and likely is) very different from Beth’s baby. You may want to consider sleep logging as a tool in your efforts to build healthier sleep habits for your baby.

Nicole’s Note
“The main takeaway from Beth’s graphs is that your baby will grow and change. Don’t worry if he’s not sleeping well when he’s 6 weeks old. That doesn’t mean he won’t ever sleep well! And, once he is sleeping well, don’t expect it never to change. ;)”

Now you get to weigh in — did your baby fall into a pattern as Beth’s did? Scroll down to share your experience with us, to ask questions, and to hear from other parents just like you!

*Beth’s App — Beth used a Time Recording — Timesheet App to track her son’s sleep. The app itself is intended to be used by employees, to track their time at work; in fact, when Beth e-mailed the app developer to tell him how she was using it, he was quite surprised! 😀

If you want to use the Time Recording — Timesheet App, Beth recommends using the free version of the app. She’s also quick to point out that there are other apps out there which are specifically designed to track your baby’s schedule. So, if you like the idea of using an app the way Beth did, you may want to use one that’s designed exclusively for that purpose.

Special thanks to Beth Ewaskowitz for creating these graphs and sharing them with us!

Baby and Toddler Sleep Resources That Work – Guaranteed!

Sleep Quick Tip – Logging Sleep

By Nicole Johnson

Today’s quick tip is to keep a log of your baby’s sleep for one or two weeks. Log wake times, nap times, nap lengths, and bedtime. Add up the total time baby actually slept (if you are unsure, as long as baby is quiet, count as sleeping). The amount of sleep a child gets in 24 hours stays relatively constant and they will shift sleep from day to night and vice versa (within reason). Once you have your log, you can take the average amount of sleep in 24 hours and use that as a guide when adjusting schedules and setting your expectations on wake-times. For example, if you know your baby gets an average of 13.5 hours in 24 hours and naps 3 hours that day, you can guesstimate (s)he will sleep about 10.5 hours that night. You will likely need to log 1-2 weeks every few months to get an accurate average, as babies change a lot in the first 2-3 years!

Disclaimer: Some babies are more consistent than others. Inconsistent babies might have a large range of the amount of sleep in 24 hours. At least if you keep a log, you know whether this is true or not.

Disclaimer 2: During growth spurts, teething and illnesses, the amount of sleep might be unusually higher or lower. Try to time your logging during a “normal” time. (as much as a baby is “normal”)

For online tracking, you can use Babble Soft. Babble Soft helps you and other caregivers keep track of activities like breastfeeding or bottle feeding schedules, baby sleep patterns, diapers, baby immunization or medicine doses, and baby’s first year photo album. This helps you really get to know your child’s schedule or to show you whether she has one (in the case of inconsistent babies, there just might not be one without your intervention!). Or, you can use good old pencil and paper or track using something like Excel where you can let it calculate the average for you.