The Wonder Weeks

You’ve probably heard about babies going through various phases in their development, not just physically, but cognitively as well. There’s a book called “The Wonder Weeks” that was originally written by Dutch professor Frans X Plooij. It claims to predict patterns and the actual periods when your baby would be going through what they call a “leap” or a cognitive jump resulting in clinginess, crankiness and possible sleep regression during this time.

These leaps usually take place within the first two years of the baby’s life, and they’ve have been able to identify 10 major phases that the baby will undergo. These range from the being able to recognise patterns (found in leap 2), to establishing relationships (leap 5) and so on. These leaps are calculated from the baby’s original due date and not the date of birth, since some babies are born prematurely. They predict that the cranky periods come at 5, 8, 12, 19, 26, 37, 46, 55, 64 and 75 weeks (give or take a week or two since each child is different).

There’s actually a bit of controversy surrounding the book: another medical professional disputed some of the claims made in it. Nonetheless, it has become very popular and has even been turned into a convenient mobile application as well.

For a detailed table explaining each leap and when you can expect it, scroll to the bottom of this article.

Our Experiences with The Wonder Weeks:

Kinda and I both downloaded the app just after our kids were born, and the timings of these so-called “leaps” were surprisingly accurate. At first we were a bit sceptical and didn’t really believe that these phases could be predicted in such a way, but after we saw the kids going through the first two leaps at the same time the app predicted, we were amazed.

It gives you a handy calendar with the dates of when you can expect your baby to go through a rough patch. It also tells you approximately how long this leap will last. This is quite helpful since a lot of people might think their child has colic because they cry a lot, but in reality the baby is going through quite a big developmental change.

Another useful thing is that it also tells you what you can do to help your baby get through the leap. It certainly takes the feeling of helplessness away knowing that there is actually a big reason behind your baby’s crankiness 🙂

Wonder Weeks

If you’ve got a new baby at home (or one in the oven), do yourself a favour and download the app. It’s really interesting to read about all the phases your baby will be going through mentally. If you feel you have some extra free time on your hands, download/buy the whole book as it goes into quite a bit more detail with many more scientific explanations.

The “Wonder Weeks” book and app does not take into account other possible upsets that might affect your baby such as Cow Milk Protein allergies, so check out our article on this topic here to find out more! 

Wonder Weeks