Wonder Weeks – How They Help You Understand Your Baby

Wonder Weeks - How They Help You Understand Your Baby

The Wonder Weeks

Have you heard about the Wonder Weeks book?

Often people say no-one has written an instruction manual for a baby.

After having three babies of my own, I believe The Wonder Weeks book is as close as you’re going to get.

It offers such an awesome insight into the ‘unknown’ brain of your baby, and why he does what he does.

It feels like a missing piece of the puzzle that you’ve been searching for!

Written by two Dutch Paediatricians, Hetty van de Rijt (who has since passed) and Frans Plooij, The Wonder Weeks is pure solid gold.

It makes stressful parenting weeks much more bearable.

“For 35 years, we have been studying interactions between mothers and babies. We have documented — in objective observations, from personal records, and on videotape — the times at which mothers report their babies to be ‘difficult.’

These difficult periods are usually accompanied by the three C’s: clinginess, crankiness, and crying.

“We now know that they are the tell-tale signs of a period in which the child makes a major leap forward in his mental development,” say the book’s authors.

Are The Wonder Weeks Accurate?

Upon recommendation from mothers and professionals alike, I bought this book after my second baby was born.

I was completely blown away at how accurate the book is.

I loved learning about when to expect these fussy phases, the trademark behaviours a baby will display, and which skills they’re mastering while going through these leaps.

So many people I know have similar sentiments and experiences with The Wonder Weeks.

There are a plethora of reviews and testimonials from professionals around the world, including this one below:

“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 behaviour, and emotional responsiveness that they might otherwise not notice or find puzzling and distressing.” — Catherine Snow, Ph.D., Shattuck Professor of Education, Harvard Graduate School of Education

Australian breastfeeding counsellor of over 20 years, Yvette O’Dowd, says she was skeptical when she first heard about it.

But upon reflection, Yvette noticed that many of the calls she took through a breastfeeding helpline would be clustered around the developmental leaps mentioned in the book.

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The Wonder Weeks Chart

The book contains a super helpful chart in a timeline format.

I recommend photocopying it and sticking on your fridge!

It helps to alert parents as to which weeks are ‘stormy’ or ‘sunny’ weeks – therefore, when your baby is more likely to be fussy or not.

The chapters go into detail about each week, explaining why each leap happens and what you can do to help your baby.

Just knowing my baby was going through an expected developmental leap took a huge load off my mind.

I knew my baby was clingy and cranky because she was simply having a hard time.

She just needed my help to ease through it.

That alone is the best thing of all.

It can make a huge difference to your confidence and sanity.


You’ll know there’s a reason your baby is having a hard time — and it’s nothing you’re doing wrong.

When The Leaps Occur

Most parents find the timing of the leaps to be very accurate.

Some babies may be a little behind or forward the dates mentioned, but the leaps will still occur.

The leaps are as follows:

  • Week 5 – The World of Changing Sensations (Leap 1)
  • Week 8 – The World of Patterns (Leap 2)
  • Week 12 – The World of Smooth Transitions (Leap 3)
  • Week 19 – The World of Events (Leap 4)
  • Week 26 – The World of Relationships (Leap 5)
  • Week 37 – The World of Categories (Leap)
  • Week 46 – The World of Sequences (Leap 7)
  • Week 55 – The World of Programs (Leap 8)
  • Week 64 – The World of Principles (Leap 9)
  • Week 75 – The World of Systems (Leap 10)

I can’t rave about it enough — you’ll definitely be glad you bought it.

The Wonder Weeks book is an international best seller, and has sold more than 1 million copies worldwide!

Grab your copy of the book from The Book Depository here (free delivery worldwide).

If you prefer Amazon, you will find the book here.

Want to know more? Check out the below great clip which summarises the book.



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Kelly Winder is the creator of BellyBelly.com.au, a writer, doula (trained in 2005), and a mother of three awesome children. She's passionate about informing and educating fellow thinking parents and parents-to-be, especially about all the things she wishes she knew before she had her firstborn. Kelly is also passionate about travel, tea, travel, and animal rights and welfare. And travel.


  1. Hi there
    I live in South Africa and am trying to purchase this book online. Any idea where i can get it from as The Book Depository, which includes free world wide delivery, shows it as currently unavailable.
    Thank you

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