New Study Highlights the Real Problem with Modern Infant Sleep Practices   - Raised Good

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Hi there!

I'm Tracy 

I'm the founder, writer and advocate behind the award-winning blog, Raised Good - a guide to natural parenting in the modern world.

Join the Mama Tribe



New Study Highlights the Real Problem with Modern Infant Sleep Practices  

Hi there!
I'm Tracy 
I'm the founder, writer and advocate behind the award-winning blog, Raised Good - a guide to natural parenting in the modern world.

I’ll never forget her words that day. And I’ll be forever grateful for the powerful influence her seasoned conviction has had on my journey as a new mother.

All our midwife said was, “He’ll sleep with you”.

I was thirty weeks pregnant and like most new mothers I was enthusiastically nesting; scrutinizing the pros and cons of the countless baby items I needed to become a good mother. I wonder if I rationalized that the more stuff I had, the more prepared I would feel for motherhood.

Of all the items we collected, our son’s crib felt the most symbolic. I remember dedicating hours upon hours to analyzing the components of baby mattresses, into finding a crib that used forest certified wood and organic, non toxic paint that promised to keep my baby safe and reduce the risk of SIDS.

When we found our perfect crib I savored slowly making my baby’s bed for the first time as I quietly anticipated his arrival.

But, our midwife shattered my reality that day and opened an enchanted door to an otherworldly possibility. I didn’t realize sharing our bed with our son was even an option. How would it work? Would he roll out? Was it safe?

With my curiosity ignited, I immersed myself into the world of attachment parenting. The deeper I explored, the more excited I became about motherhood. While the methods were unquestionably unconventional when measured against our cultural norms, my maternal instincts rejoiced and I felt a positive paradigm shift take place.

Since then, names like Dr. James McKenna and Prof. Helen Ball have become legendary in our home. Their approach to infant sleep makes sense and is backed by rigorous science, evolutionary history, anthropological evidence and most importantly they reinforce a kind, empathetic and compassionate attitude.

Because, when it comes to night time parenting, it seems as though we lose our ability to empathize; modern day parents are peer-pressured into denying their baby’s needs. When babies don’t conform, rather than listening and responding to their desperate protests, we set timers, use ear plugs and create special names, like controlled crying or spaced soothing, for the tactics we exploit. Ultimately, society persuades parents that their actions are serving a noble cause; teaching babies how to sleep.

But the truth is, babies don’t need to be taught how to sleep, just as they don’t need to be taught how to breathe or walk or talk.

Through cultural osmosis we’ve become entangled in a web of confusion surrounding sleep that attempts to merge scientific truths with cultural beliefs; convincing ourselves the two are one and the same. As a result, articles regarding mother-infant room-sharing and sleep outcomes based on results from the recent INSIGHT study are born.

The authors of this new study set out with an admirable aim; to investigate key factors that may predispose children to obesity. But, some of the conclusions drawn have provoked many people, including myself, to question not only the validity of the study but the underlying intentions of the authors.

Why? Because, with incomplete science, they’ve made the wild assertion that the recommendation for babies to room-share with their parents by the American Academy of Pediatrics’ is unfounded and has possible negative consequences for sleep.

What is their assertion founded on? On data that has been assessed from 230 mother-infant dyads participating in an ongoing, prospective, randomized, controlled study. One of the findings of the study is that “room-sharing at ages 4 and 9 months is associated with less nighttime sleep in both the short and long-term, reduced sleep consolidation, and unsafe sleep practices previously associated with sleep-related death.”

In short, the authors claim that the earlier infants sleep alone, the more likely they are to experience longer stretches of continuous sleep. These results may seem to support the authors’ position that babies should sleep alone, but the science and conclusions are flawed. Here’s why.

Firstly, bed sharing mothers and infants were excluded. 279 mother-infant pairs were recruited but only 230 pairs were reported in the study. This is partly because mothers who elected to bedshare with their infants were excluded.

Why? No plausible reason is given in the Pediatrics article, but it may be because studies at the Mother-Baby Sleep Laboratory at the University of Notre Dame, and others, have shown that bedsharing mothers receive more sleep in minutes than solitary sleeping mothers (Mosko et al 1997).

But, isn’t this study about the number of minutes babies sleep, not mothers? That brings us to the second and fundamental flaw of the study.

Infant sleep was parent reported. Research has shown that when compared to actigraphy, a non-invasive method of monitoring sleep/wake cycles, there is a vast difference between what parents observe and what actually happens. In a Canadian study, parents reported their infants woke on average three times per night whereas actigraphy showed their babies were actually waking eight times per night.

Interestingly, this study also compared infant night waking to parent perception of sleep problems” over a six-week period. While there was no change in babies’ sleep patterns (waking 8.2 times at baseline vs. 7.9 times at six weeks), the parent perception as to whether their infants had a sleep problem” dramatically decreased from 86% to 31%.

This is reaffirming news for bedsharing parents as solitary sleeping parents often claim that their babies sleep through the night. It simply isn’t true. Parents may be sleeping for longer periods, but their babies are not.

A little sleep training and a pair of earplugs cannot undo millennia of evolutionary blueprinting.

Dr. McKenna also reports that bedsharing mothers often underestimate the number of times they wake to nurse their babies by as much as 50%. When bedsharing mothers and solitary sleeping mothers were asked about their quality of sleep, 84% of bedsharing mothers said they’d experienced “good” or “enough” sleep whereas only 64% of solitary sleeping mothers said they’d had “good” or “enough” sleep.

This is also supported by research by Kathleen Kendall-Tackett who reports that in a study involving 6,410 mothers of infants aged 0-12 months, women who exclusively breastfeed reported significantly more hours of sleep, better physical health, more energy and lower rates of depression than those mothers who formula fed.

In an interview with Pinky McKay, Kendall-Tackett expanded on these results explaining that exclusive breastfeeding is almost universally associated with bedsharing (breastsleeping). Mothers who breastsleep find it much easier to fall back to sleep after waking owing to a myriad of biological and hormonal reasons and therefore feel less tired in spite of more broken sleep.

Babies in the study were sleep trained. Parents were encouraged to follow non-responsive techniques to train their babies NOT to communicate their night time needs. These methods included no feeding to sleep, encouraging “self-soothing” as a means to fall asleep both initially and through the night, moving babies to their own rooms by three months of age and avoiding night time feeds by 4 months of age.

It is important to recognize that non-responsive sleep training is not about helping babies sleep longer, better or more peacefully. It is about conditioning babies to be silent through the night which is at odds with what babies are biologically programmed to do.

This adds another confounding layer onto the way in which these results misrepresent the realities of normal infant sleep; babies who were silent in this study didn’t wake their parents because they were sleeping but because they’d been trained to remain quiet.

This approach would be similar to studying the stereotypical behaviours that captive mountain gorillas develop in order to survive the confines of a zoo, labelling these abnormal behaviours as “normal” and then being confused as to why wild gorillas behave differently in the wilds of East Africa.

When we mess with nature and place artificial limits on our babies’ ability to express their needs, we break their spirits and we lose their trust. We may get a little more sleep, but is it worth it? Don’t our children deserve more consideration and compassion than that? 


I once heard that if all we needed was more knowledge, we’d all be healthy, happy and wealthy. Because knowledge is readily available. When it comes to parenting, we know how babies are designed to sleep safely. We know the best way to nourish their growing minds and young bodies. And we know that honoring ancient wisdom and following our instincts can contribute to greater maternal happiness.

Knowledge isn’t the problem. The problem is acceptance.

Western society categorically resists accepting the fact that babies don’t fit into adult timetables, that they need to be held, that they crave sleeping next to us and that it’s normal for babies wake often, nurse and seek the reassurance of their protectors in the wee small hours of the morning.

The manmade disconnect between biological needs and cultural norms places impossible expectations on parents, fuelling mommy wars and shrouding senseless guilt on new mothers.

But, what if we take a step back, recalibrate our perspective and accept the realities of babyhood?

Perhaps we’d realize that there isn’t a problem with infant sleep and that the real issue is unrealistic adult expectations. What if instead of resistance we chose acceptance? What if we authentically supported mothers, so that they can give their babies what they need?  

If we chose acceptance maybe the authors of this study may have dedicated their resources to exploring ways in which we could increase breastfeeding rates and longevity. After all, we know that there is a dose-response effect between breastfeeding duration and the risk of childhood obesity.

Or maybe the authors may have researched ways in which to promote safe cosleeping environments. After all, we know that non responsive sleep training methods, most often associated with solitary sleep, results in elevated cortisol levels, which in turn are associated with an increased obesity risk.

Or perhaps the authors may have looked at the global correlation between the lack of support for new mothers, in the form of maternity leave and its inverse relationship to breastfeeding rates and childhood obesity.

But, the reality is, this study like many others, isn’t about science. It’s about politics. And there has never been a better time than this to call bullshit on misguided politics.

Hi there!

I'm Tracy

Hi there! I’m Tracy - the founder, writer and advocate behind the award-winning blog, Raised Good - a guide to natural parenting in the modern world. Based in Vancouver and originally launched in 2016, I’ve been overwhelmed by the positive response and the global community that’s developed. 

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  1. Rebecca says:

    Thank you for these words. We too had a midwife who just showed me to b’feed lying down in bed and when my daughter fell asleep, I asked naively “What do I do with her now?”, her reply of “let her sleep here” changed our lives. We have had an amazing experience with our now 4 year old girl (who chooses most nights to still be with us), and cannot emphasise how right co-sleeping has been. Being able to soothe, comfort and rearrange or find her lost bunny in the small hours has meant we have been able to truly care for her at all hours (and meant more sleep for us all yay!). Following that inner mother voice really did start with this sleeping decision and has flowed into all our parenting since. Feel so blessed to have been gently guided from the start.

  2. Kymberly says:

    Our son will be 2 next week and has never slept in a crib. People are often surprised at this. Most often they show concern for his safety at the height of the bed or someone rolling over on him. We would point out that our bed is on the ground in the first place, because that is where we like it. Rolling over on the baby Wasn’t an issue because we were always aware of his presence being of sound mind and body. I still breastfed and Liam nurses often at night, many times without me even noticing he latched on. I could not imagine the lack of sleep if he were in another room. The most important aspect to me is that he is always there and surrounded by love. We put him to bed together reading books and nuzzling him. He rolls from one of us to the other expressing love. In the morning I am greeted with his smile or the back of his head watching his body rise and fall in sound sleep. No matter what every morning we greet each other with a smile and I can see that he knows he is loved by how close we are to him all through the night.

  3. Marianne says:

    I also recently read this article and will have to admit that my heart dropped a bit, thinking that by still room-sharing I was undermining my baby’s ability to get good long-term sleep habits. But then my scientist brain turned on and I, like you, started to critically evaluate this article.. Parent-reporting of babies sleep is definitely a problem especially as these reports were only done once at 4 months and once at 9 months and asked the mothers to reflect on the past week. (I can barely accurately remember the past 24 hrs) which makes the calculation of average sleep in minutes seem a bit too accurate for this type of survey. (Also, an n=1 for each time point (4 months and 9 months) may also not be a great indication of true sleep. What I also found odd about this paper was that they seemed to randomly assigned a time frame for “daytime” sleep ( 7 am – 7 pm) and “nighttime” sleep (7 pm – 7 am). But then say that most room sharers had later bedtimes, past 8 pm (which could imply that these babies also slept later than 7 am, like mine does). It is not clear then when they report “night time” sleep, whether these extra hours after 7 am are included! Anyways, I’ll stop there but thanks for this post and for discussing this article. 🙂

  4. Lauren says:

    The authors stated why bedsharing parents were omitted (“For the current analyses, those parents who reported bed-sharing with their newborn were excluded because the goal was to compare those who were sleeping independently in a separate room from parents with those still room-sharing but not bed-sharing (as recommended by the AAP)”). As such, the study cannot speak to bedsharing, only room sharing. It is also reminiscent of the excellent Keller and Goldberg study that differentiated between early co-sleepers, reactive co-sleepers and independent sleepers. These distinctions are rare but help to elucidate the complexity of the issues, as well as parental motives and priorities; without this level of complexity held in mind, findings like this study tend to overstate their conclusions and overgeneralise their findings.

  5. Sharyn says:

    Thank you so much for this article, which I will be sharing. It was a midwife in neonatal that whispered to me, “if you want to all get some good sleep and bond after your traumatic birth, breastfeed lying down and allow him to sleep in bed with you. I believe it’s much safer than leaning over him to feed in the night and dozing off. Don’t listen to people who say you shouldn’t bed share”. After a traumatic birth where I was unable to bond with him or hold him for th first week of his life, we really needed to connect and I needed for him to feel safe. Sleeping with us just felt the most natural thing in the world and I knew it was the right thing with every ounce of me. My partner was hesitant because he didn’t trust that he wouldn’t roll over on him. But soon realised he was always aware. We’ve never really lost much sleep or where we have, at least we are more rested rather than completely awake and mobile.

    People have said Aspen is ‘high maintenance’ or a ‘clingy baby’ because he likes to sleep on us, with us and be around us. But unanimously everyone says he’s one of the happiest babies they’ve ever known.

    It’s the go-to Q for strangers, friends and relatives, “Is he sleeping through the night yet?” My answer in my head is, “No, are you??” But I just smile and reply, “He’s great and loves his sleep”. The reality is that he does everything to make sure he never opens his eyes, when he kicks around from wind (which he still has at 5 months old) and has learned to roll on his side and latch on until he is soothed back to sleep. He loves his sleep. I barely even notice him latching. I am so passionately against this notion of babies having to ‘sleep through’ and sleep training. It is so alien to me! And so funny mummies get competitive! As with everything, Aspen teaches us when he’s ready, how much or little of something he needs etc. and I never compare to others.

    The one question I have is how to put him to (our) bed eventually so that mummy and daddy may have some time together to cuddle up in the living room and watch a film or something. That’s the only down side for us. But how close we all are as a family/in our relationship because we’ve bonded and felt more rested and happier, outweighs that little factor anyway. Unfortunately I have to return to work full time when he is 9 months old and he will be fed through expressed milk via a childminder. Although this goes against everything I feel, financially daddy and I don’t have a choice.

    Attachment parenting is the most natural thing in earth, so much so, I don’t feel like it’s a parenting ‘style’. It’s just beautiful parenting. Xx

    • AJ says:

      My Auntie asked my sister in law the “is she sleeping through yet” question and my sil’s face fell, like she was going to cry having to explain yet again that no, her 14 month old was not conforming to societies rules. So I stepped in and said “sorry, but I’m 34 and I don’t sleep through the night yet!” This caused a laugh around the table, others agreed, my dad saying he has to get up to wee ???? My Auntie didn’t ask again. (or at least not at that meal)

  6. Lisa says:

    I love this. We’ve bed shared with all five of our children. It’s as normal as breathing now but it was earth shattering with our first.

  7. Susy says:

    This resonates with me so much, I absorbed all the information above with such a heavy heart due to the fact this is not known, understood or disregarded. It disappoints me no end that some new mums are missing out if they are not accessing this information on bonding and attachment with their children. I never even knew about any feeding techniques, cosleeping or anything but the moment my son was born I knew I’d perserve with breastfeeding despite the fact I had no idea what I was doing, the love for my child was creating a hormonal mess but I didn’t know what I was supposed to do at night time but I knew I could never leave him. Eventually a fantastic breast feeding peer supporter told me about feeding laying down! I never even thought of that, stupidly I felt, but then I was in the middle of a massive storm of new motherhood and I was left shell shocked from the birth. That feeding tip saved our breastfeeding relationship and we went on to feed for 5 years. It was the most amazing yet hardest thing I have ever experienced in my life and I slept with just my baby for 2 years on our own first. People should be open to information and knowledge and if you only every mother had the chance to do this bonding and attachment but sadly a lot of other factors come into play. It was beautiful to read your words that support my style of loving and nurturing my child. Thank you X

  8. […] of advice is going to “fix” your child’s sleep problem. I read a great piece today that said ”But the truth is, babies don’t need to be taught how to sleep, just as they don’t need to be … ( fantastic read!) For the first time I read something that made complete and total […]

  9. […] The research on why you shouldn’t do it is easy to come by and worth reading. Start with this article if you need somewhere to begin, it’s an excellent read. So […]

  10. Libby says:

    I love your outlook and knowledge on this topic. However, I wish I had found your website sooner! I coslept with my daughter (now 16 months) for the majority of the time she was nursing, which was around 9 months. At the very least, I slept in the same room with her for that time, plus a few more months. Basically, I would put her to “bed” in her rock and play (as an infant) or pack and play (once she outgrew the rock and play), and when she woke up during the night I would bring her into the bed with me to nurse and she would sleep the rest of the night/morning there with me, waking up every few hours to nurse. I too always felt awkward telling people that she basically slept with me when they asked me about her sleep. But, like you, I always felt really conflicted when I read about the sleep training methods my friends used and suggested. It didn’t feel right to me, especially while she was so tiny and helpless. But once my milk dried up and I didn’t necessarily “need” to bring her into the bed with me when she woke up, I thought I was “supposed” to take that time to start “teaching her to sleep on her own.” In retrospect, I think that change in co-sleeping has had a big impact on me. I miss it, a lot. Now it terrifies me to think of the impact it has had on her. Sleeping on her own was hit or miss at first, but then she kind of started ..loving it. The kid sleeps like a champion. Sometimes I get a little selfish and sentimental and want to hold her or rock her until she goes to sleep, but she won’t do it. She either thinks it’s time to play, or just squirms around and won’t fall asleep. It’s almost like the second she is in her crib she’s out. Obviously not every night is this way. I’m just saying, she sleeps very well in her crib in her room alone, but not only do I feel ambivalent about this fact, but I also feel completely horrible thinking about all of the times over the past few months that she has woken up in the middle of the night and I have literally said the words “they say to give it 10 minutes and if she doesn’t go back to sleep you can go in.” What?!? Who even is “they” and why do I care what they think? I can honestly say that it really is just what I thought was widely accepted as “best practice” for this whole “teaching to self-sooth” thing. It breaks my heart thinking that my baby has felt helpless, ignored, and confused waiting on me to come get her when I never did. What I need to know now is, can I undo that damage? I know it isn’t too late to stop the cry it out nonsense, but should I try and make any other changes with her sleeping arrangements? I thought that my feeling less bonded with her was just in my head, or just part of having an extremely active toddler who just wants to get down and explore all of the time instead of sit and cuddle. But now I feel like this is exactly why I have been feeling that way, and it makes me sick. Do you think that by simply eradicating the previous cry it out methods I was using will help? Any suggestions are more than welcome. Thank you again so much for all of the information you provide on this site. I appreciate it so very much.

  11. Viktoria says:

    Thank you for the article. Co-sleeping is also so natural and practical to me (I have a 19 month old baby girl). But sometimes I ask myself, when should a separate bed / room for my DD come into question? Are there any guidelines regarding the age, when the toddler is ready to sleep alone?

  12. Han says:

    I love everything about this article, the topic, the intention, the clarity, the evidence you bought, your manner of dealing with the issues, Absolutely beautiful, thank you for sharing <3

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