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The Wonder Weeks: A Stress-Free Guide to Your Baby's Behavior Paperback – Illustrated, September 10, 2019

4.7 4.7 out of 5 stars 3,144 ratings
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Everything a new parent needs to know about their baby’s 10 magical “leaps”―and when to expect them―in a new, modern sixth edition of The Wonder Weeks

The Wonder Weeks answers the question, “Why is my baby cranky, clingy, and crying?” with helpful guidance. Maybe they’re experiencing a leap in brain development, after which new skills are mastered, discoveries are made, and perceptions evolve. Fussy behavior might signal that great progress is underway!

Better yet, these phases occur on similar schedules for most babies―as explained and mapped out in this book―so parents can anticipate the “stormy weeks” that precede the “sunny weeks.” Based on decades of research, this fully revised sixth edition covers the first 20 months of a baby’s life and includes:

  • The top 10 things to know and remember about a leap
  • Fun games to support brain development
  • Fill-in-the-blank checklists to help better understand personality and behavior traits
  • Science-based explanations about sleep
  • Fresh insight and recent commentary from new parents who’ve used The Wonder Weeks
  • Anchor moments to keep new parents sane, especially when they are exhausted and discouraged

With 2 million+ books sold, and 4 million+ downloads of the corresponding app, The Wonder Weeks has struck a chord. Join the phenomenon that has been embraced by celebrities, social media influencers, and parents worldwide.

Black & white illustrations throughout
Previous page
  1. Print length
    464 pages
  2. Language
    English
  3. Publisher
    Countryman Press
  4. Publication date
    September 10, 2019
  5. Dimensions
    6 x 1 x 9.1 inches
  6. ISBN-10
    168268427X
  7. ISBN-13
    978-1682684276
  8. See all details
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From the Publisher

Join the millions of new parents who live by the leap with The Wonder Weeks

PopSugar praise

Pregnancy & Newborn praise

Bump praise

Get tips, ideas, and advice for every stage of your baby's development

2 million books sold worldwide

Love the leap!

4 million app downloads

Editorial Reviews

Review

"Anyone who deals with infants and young children will want to read The Wonder Weeks. This book will open parents' eyes to aspects of their children's growth, development, changing behavior, and emotional responsiveness that they might otherwise not notice or find puzzling and distressing."
― Catherine Snow, PhD, Shattuck Professor of Education, Harvard Graduate School of Education

"This is a very practical and entertaining window into the baby's first year and a half. van de Rijt and Plooij have observed and found the vulnerable times in an infant's development that I independently came to in my book Touchpoints (Perseus). The authors' observations and practical suggestions are wonderful."
― T. Berry Brazelton, MD, professor emeritus, Harvard Medical School

"The Wonder Weeks is the newly-updated go-to guide for understanding your child’s mental developmental milestones (referred to as “leaps”)….Understanding the real reason behind crying and eating and sleeping problems is the only real solution parents need, and take it from us―you’ll be glad to be in the know."
― Pregnancy & Newborn

"One of our personal favorites…[a] comprehensive guide to baby’s development during the first 20 months…"
― The Bump

"Reading The Wonder Weeks saved my sanity more than once during the times my baby got inexplicably fussy or refused to sleep. It's a must read for any new mom."
― Popsugar.family

"Armed with the insight of [The Wonder Weeks] I would have been more confident as a new parent... rather than anxious, about how my baby was experiencing the world"
― Rookie Moms

"Fantastic tips on how to help baby reach his potential during and after [the wonder weeks]."
― The Cradle Coach

"Once I realized there was a reason―and a positive reason, at that―that my kid had suddenly turned terrible, it eased the pain of parenting through these times."
― Mom.com

"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."
― The Baby Sleep Site

About the Author

Xaviera Plooij is a mother of three and the best-selling author and CEO of The Wonder Weeks brand. She lives with her children in the Netherlands.

Frans X. Plooij, PhD, has been conducting research in the field of psychology for close to 50 years. Highlights include working alongside his wife, Dr. van de Rijt, with Dr. Jane Goodall on infant development in free-living chimpanzees in the Gombe National Park; leading the department of Research and Development at the institute for Child Studies of the City of Amsterdam; and currently presiding over the International Research Institute on Infant Studies (IRIS) at Arnhem, the Netherlands. He is a full member of several international scientific societies in the domains of child development and behavioral biology and of the New York Academy of Sciences.

The late Hetty van de Rijt received her PhD at Cambridge University as a physical anthropologist. With her husband, Dr. Plooij, she studied infant development in free-living chimpanzees with Dr. Jane Goodall in the Gombe National Park. As a researcher at the University of Amsterdam, she studied the development of human babies in their home environment through direct observations, filming, and in-depth interviews with their parents.

Product details

  • Publisher ‏ : ‎ Countryman Press; 6th edition (September 10, 2019)
  • Language ‏ : ‎ English
  • Paperback ‏ : ‎ 464 pages
  • ISBN-10 ‏ : ‎ 168268427X
  • ISBN-13 ‏ : ‎ 978-1682684276
  • Item Weight ‏ : ‎ 2.31 pounds
  • Dimensions ‏ : ‎ 6 x 1 x 9.1 inches
  • Customer Reviews:
    4.7 4.7 out of 5 stars 3,144 ratings

About the authors

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Previous page
  1. Hetty van de Rijt

    Hetty van de Rijt

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    The late Hetty van de Rijt-Plooij received her PhD at Cambridge University as a physical anthropologist. With her husband, Dr Plooij, she studied infant development in free-living chimpanzees with Dr. Jane Goodall in the Gombe National Park. As a researcher at the University of Amsterdam, she studied the development of human babies in their home environment through direct observations, filming, and in-depth interviews with their parents.

    See more on the author's page
  2. Frans X. Plooij

    Frans X. Plooij

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    Full content visible, double tap to read brief content.

    Frans X. Plooij, Ph.D., has in the field of psychology for close to 50 years. Highlights include working alongside his wife, Dr. van de Rijt-Plooij, with Dr. Jane Goodall on infant development in free-living chimpanzees in the Gombe National Park; leading the department of Research and Development at the institute for Child Studies of the City of Amsterdam; and currently presiding over the International Research-institute on Infant Studies (IRIS) at Arnhem, the Netherlands. He is a full member of several international, scientific societies in the domains of child development and behavioral biology, and of the New York Academy of Sciences.

    See more on the author's page
  3. Xaviera Plas-Plooij

    Xaviera Plas-Plooij

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    Full content visible, double tap to read brief content.

    Xaviera Plooij, mother of three and CEO of the Wonder Weeks, has one mission: to give parents the tools they need in order to fully understand their baby’s mental and emotional development. Daughter of Dr. Frans X. Plooij and Dr. Hetty van de Rijt, founding authors of The Wonder Weeks, Xaviera Plooij has significantly revised and modernized the sixth edition of the book. As a writer, columnist, and popular speaker, she’s in 24/7 contact with parents around the globe. Plooij is a trusted member of the Lumi by Pampers Expert Advisory Panel. She lives in the Netherlands.

    See more on the author's page
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Customer reviews

4.7 out of 5 stars
4.7 out of 5
3,144 global ratings
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The whole first chapter was misprinted and folded into the binding. Because I’m a distracted pregnant mom who didn’t notice this until a month after I bought it, Amazon won’t let me return it. Not worth the price since I can’t read the chapter I’m most interested in for when my new baby arrives!
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Top reviews from the United States

Savannah
5.0 out of 5 stars Must have
Reviewed in the United States on March 18, 2024
Verified Purchase
This book is so helpful for first time moms. Walks you through step by step of your child’s milestones. Helped answer a lot of questions we had.
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rebekah kohn
5.0 out of 5 stars Bayshower gift
Reviewed in the United States on March 4, 2024
Verified Purchase
This book is a go to gift for friends having their first baby! Tells you everything you wouldn’t know or learn from other resources. A very helpful guide to get you thru the toughest stretches with a newborn!
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Michael Catania-Mcdonough
5.0 out of 5 stars My wife loved this!
Reviewed in the United States on February 13, 2024
Verified Purchase
My wife read this book while our daughter was entering each leap. She found it helpful and insightful as to what other parents were experiencing while their children were specific ages. She found it helpful to read each chapter as our daughter was entering into that specific leap.
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Stephen Pace
5.0 out of 5 stars Recommended for any new parent
Reviewed in the United States on December 14, 2023
Verified Purchase
I had my first kid this fall and bought this book after a friend recommended it. It is extremely helpful when your kid is going through the different stages or “leaps” in their development. The timelines between each “leap” is accurate to the week and has not only provided guidance but also reassurance to do the right things for your child. If you are expecting buy this book!
One person found this helpful
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Me
4.0 out of 5 stars The jury is still out but starting to be convinced...
Reviewed in the United States on March 11, 2020
Verified Purchase
We are not first time parents, this is our second child... Baby is 11+ weeks old I think we're on Leap 3. Initially, when I read the second leap I thought this book was nonsense, our baby was being suddenly fussy and such but didn't realize until I looked at the calendar and saw our baby was indeed 7 weeks old and the 8 week leap was nearing. Our baby was born right about her due date, and then we hit 11 weeks and suddenly the baby is not sleeping well, like REALLY waking every 40 to 45 minutes, and then today ate less but slept a lot and I realize, the 12 week leap is upon us. Our baby seems to have the difficult phase during the week leading up to the leap. During the time, she's wanted to be held extra much / has had trouble sleeping, etc. This gives me hope that this sudden bout of sleeplessness is indeed the third leap. Will update the review when we come to the other leaps... but so far, this has been helpful. The writing is a bit odd because it's translated from Dutch. I've lived overseas and am familiar with the way non-English languages translate into English (most people won't notice this). It's not bad at all, just sounds a bit stilted. And one star deducted for the filler fluff added (because really there's not enough info for a full length book). It is also a bit ambiguous. You know, "your child may have this leap before or after" well then it's not really predictable then is it? It's sort of like, "Your child may sleep poorly or they may eat less or they may eat more or they may sleep more" lol so it's sort of like it could be true for anyone, in a way (or am I just too sleep deprived to fully absorb it??) I expected more science or studies referenced to explain the behavior / brain changes with baby. The book seems pretty simplified and not very scientific or psychological so I considered that maybe the theories in the book were just "made up" but seeing that the leaps (so far) have accurately coincided with my baby's noticeable (and quickly passing) behavioral changes, I give it the benefit of the doubt... Also because, thinking back, our first baby slept GREAT until the time that would coincide with her 4th leap... which is known to be a big one. Perhaps it would have helped to have this book then. We shall see if this book holds true... will update in a few months!
60 people found this helpful
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AMK
5.0 out of 5 stars A Sanity Saver!!
Reviewed in the United States on August 22, 2022
Verified Purchase
Trying to figure out if you're doing "the right thing" for your baby is hard. Super hard. Especially when they cannot yet speak or clearly communicate just what they need. And when they go through "leaps," as outlined in this book, it's particularly stressful, because you're constantly wondering if their sudden crankiness and generally unruly disposition is because you're doing something "wrong." I found this book to be such a sanity saver for these periods of growth. Instead of driving myself mad wondering what was wrong, I was [mostly] able to shift my mindset to an understanding that what was happening was completely normal and healthy, and I gained a huge appreciation for the process of development that I don't think I would have otherwise been able to view in the same way. It made it so much easier to remember to take a deep breath and just ride it out when we were in hour two of trying to get the little one to sleep, or wearing a track in the living room carpet a 3am...! I also found a great amount of solace in the author's repeated reminders that all people are different, so don't compare your baby to other babies to decide who is "ahead" or "normal," but instead watch your child closely to see what THEY are interested in exploring, and support them on their journey. It was also very reassuring to me that they continually reminded the reader to remember that the skills/developmental milestones that are outlined for each leap are the earliest possible time which the lists of milestones may appear. In other words, no worries if your child doesn't display the behaviors until a later time. We also downloaded the companion app, which I only really found helpful because then I could look at the built-in calendar to see when we were approaching the start of a new leap. Some of the videos and things were good, too, but if you're going to get only one, get the book for sure! Have recommended this book to every other parent I know.
8 people found this helpful
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An A
5.0 out of 5 stars Very Helpful
Reviewed in the United States on October 3, 2023
Verified Purchase
Thanks to a friend who told me about this book, I purchased it before we had our first baby, and it has been nothing but helpful. The concept of the wonder weeks is pretty accurate and it helped me to anticipate the major changes and leaps of growth my baby would be experiencing. It helped me to realize that when my baby is fussy or crying more than usual, it's because she is going through major leaps of growth and this has helped me to have a more understanding approach to parenting. The suggested games to play with baby are helpful. The best part is the checklist at the end of each chapter that helps you to keep track of important milestones based on age.
One person found this helpful
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Maddie
5.0 out of 5 stars Enriching and Important
Reviewed in the United States on December 11, 2023
Verified Purchase
Completely enhances my experience as a mother watching my baby develop. I love knowing where he is in his cognitive growth and what to expect as he goes through his challenging and exciting first months on earth.
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Top reviews from other countries

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Cheryl
5.0 out of 5 stars I give this to every prospective mom... .best book ever!!!
Reviewed in Canada on April 21, 2023
Verified Purchase
a must have for every new parent! Gives easy to read and understand insight into your baby for first year.. Now we want the sequel! Best baby shower gift !
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federico toccacieli
5.0 out of 5 stars Un grande aiuto
Reviewed in Italy on December 12, 2023
Verified Purchase
Ben scritto e di facile lettura, un ottimo sostegno nella scoperta delle settimane difficili di crescita.
I tempi di consegna sono stati più lunghi del normale provenendo dall'estero.
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yalcinn
5.0 out of 5 stars Verz helpful for the first child
Reviewed in Germany on December 4, 2023
Verified Purchase
The book really helps tracking the development jumps in your newborn's first months. Also helps you to know what is to be expected and how to prepare. Definitely recommended.
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CHARVOLEN A.
5.0 out of 5 stars Très bien
Reviewed in France on August 30, 2023
Verified Purchase
Un bon guide pour toutes les mamans
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Karis N.
5.0 out of 5 stars This is not a book which tells you what to do.
Reviewed in the United Kingdom on June 1, 2022
Verified Purchase
This isn't a book that tells you what to do. It's not a book which is black and white n terms of the info. If you are looking for a book like that - look somewhere else.
From the more negative reviews I have seen, people haven't understood how this book works.
For example - you have a stormy phase of a leap after which your child will have the brain functionality to add new skills.
Bear in mind - leaps are not software updates. They don't go through a leap and then gain a whole set of skills overnight. So many of these reviews are saying that it caused worry about hitting milestones and then they complain that it doesn't happen all at once. This isn't a checklist of milestones, rather it is a checklist of skills. New skills are developed over time.
I personally use the book in conjunction with the app, I use the app to keep track of the actual dates for my child and use the book for further information. Once my baby has gone through a leap, I have a look at what new skills are due to present themselves. Some show up sooner than others. Some take a couple more leaps before they arrive. And it helps me be more patient with my child when they are upset because their brain could just need a break.

Yes there is a lot of repetition in the book
... If that is going to irk you, then you are better off with just the app. But again, the book isn't designed to be read cover to cover in one go - it is a reference book which you are more likely to pick up every couple of weeks... And then it ends up being a good reminder to check in on your kid and yourself and remind you that if you are stressed to take a min and show you that you aren't the only one out there who is going through this.

I hope this helps some people understand the purpose of the book and how it can help them in the way it is designed to.
16 people found this helpful
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