Skip to Content

Wonder Weeks Leap 1 – William’s Experience

wonder week 5 leap 1

I was introduced to the Wonder Weeks when Caroline was a few weeks old. I was immediately intrigued and got the app on my phone.

The app asks for your baby’s due date to calculate predictions on when they will enter what it calls leaps, or “fussy phases”.

“From our research, we are now able to predict, almost to the week, when parents can expect their babies to go through one of these ‘fussy phases’.”

The Wonder Weeks (van de Rijt and Plooij), page 2

I decided to track our daughter’s phases based on her due date, as well as her birth date, just out of curiosity.

As it turned out, Caroline reached her leaps almost perfectly to the predicted start day…based on her birth date, not due date.

As a result, I tracked her developmental leaps based on her birth date moving forward.

The book is absolutely fascinating. I wrote a review about the book at this post if you are interested to read more before purchasing a copy.

The app has valuable information and is useful for tracking purposes, but the book has a plethora of information on the skills learned in each leap, and signs to watch for etc.

It even has checklists of abilities that your baby is likely to start showing during each wonder week.

We really enjoyed reading about these leaps, and have decided to follow along with William’s wonder weeks as well.

I, again, tracked both his due date and his birth date in the app to see which he’d line up with. He hit wonder week 5 (leap 1) perfectly- based on his birth date.

If I’d followed his due date instead, it was saying he had over a month before reaching it. It was clear immediately that this wouldn’t be the case.

He’s just finished up the first leap, and he exhibited many of the skills noted in the book.

You can find all of our wonder week reports on this leaps and milestones page.

The First Wonder Week

wonder week 5 leap 1 during baby's fifth week of life

Wonder Week 5 is actually the first wonder week. Wonder weeks are labeled by the week that they are anticipated to happen during your baby’s life.

“At about 5 weeks, and sometimes as early as 4, your baby will begin to take the first leap forward in his development. New sensations bombard your baby inside and out, and he is usually bewildered by them.”

The Wonder Weeks (van de Rijt and Plooij), page 38

William entered this leap right on time!

Wonder Weeks Chart

Page 47 in the Wonder Weeks book, shows the first checklist of interests and physical changes that may occur during wonder week 5.

For more detailed information, check out the book! Here is our experience with each of the skills:

Baby Sleep Solutions
The Highly Sensitive Child Book
The Wonder Weeks Book
Childwise Book
Pottywise Book
Preschoolwise Book
Toddlerwise Book
Babywise Book
Baby Sleep Solutions
The Highly Sensitive Child Book
The Wonder Weeks Book
Childwise Book
Pottywise Book
Preschoolwise Book
Toddlerwise Book
Babywise Book

“No two babies are exactly the same. Each baby has his own preferences, temperament, and physical characteristics, and these will lead him to select things in this new world that he, personally, finds interesting. Where one baby will quickly sample everything, another will be captivated by one special skill.”

The Wonder Weeks (van de Rijt and Plooij), page 16

In other words… your baby may check off everything that is listed on this checklist, or find a few special skills to focus on.


Are you looking for help with baby schedules and sleep?

I’ve created two invaluable resources for you based on my personal experiences with my babies and in helping countless other parents.

1. I wrote a book about all of my tips and tricks when it comes to baby schedules, sleep and more. I wrote this book with new parents in mind, so it’s an EASY read and it’s realistic and something you can start implementing immediately.
2. I created schedule tracking sheets for your baby’s first full year.

Where can you get your copy of these resources?

Baby Sleep Solutions Book
You can get this book on Amazon, in 3 formats:
Click here to go to amazon and add this to your cart.

Baby Schedule Tracking Sheets
These sheets also come in multiple formats!
1. Printable sheets right to your inbox and out of your printer.
2. Paperback book (with over 365 sheets to get your through each age for an entire year)

baby sleep solutions book

Baby Sleep Solutions Book

You guys I am so proud of this accomplishment because it turned out to be the perfect parenting book. It’s exactly what I envisioned:

-Easy to read.
-No fluff.
-Realistic to implement.
-REAL- it’s our real life situations that you can relate to.
-This book contains 6 easy and realistic steps to take with your baby to have them sleeping through the night and on a great schedule.

View the book on amazon by clicking here.

Schedule Tracking Sheets

These sheets are not only a great place to record YOUR baby’s schedule and observations, they have the recommended schedule, wake times, nap times, etc. for each age listed out for your reference!

You can grab a paperback book on amazon by clicking here.

Or you can head to my Printable Parenting Tools shop and get the printable sheets delivered straight to your inbox by clicking here!

  • Looking at things longer and more often (the book also mentions that they can see farther now, so more things catch their interest). William is definitely doing this!
  • Listening to things more and paying more attention to sounds is also something he’s doing.
  • He is more aware of being touched. He really leans into my snuggles now and rubs his face against mine. When eating, he grabs at my shirt, and he’s doing a lot more intentional grabbing in general.
  • Smiles for the first time- William gave some definite grins and happy gurgles during this leap.
  • He is staying awake longer at times, and is definitely more alert when he is awake.
  • He’s also very distracted when nursing. He will scream and scream for food, but then as soon as I sit down with him to feed him, he’s just looking at my face, looking around, and even investigating my nipples. He’s hard to keep focused right now!

For a full list of even more things that William didn’t focus on, check out the book!

Physical Changes:

  • Startling and trembling less often is something that I noticed a little bit with him.
  • Crying real tears for the first time was something that happened! William has had a couple of real tears.
  • Chokes less, vomits less, and burps less are also mentioned. I’ve noticed specifically that he is burping less often and it is harder and harder to get one out of him!

Signs and Fussiness

William was definitely more fussy during this time.

Get the Wonder Weeks Book on Amazon:

Baby Sleep Solutions
The Highly Sensitive Child Book
The Wonder Weeks Book
Childwise Book
Pottywise Book
Preschoolwise Book
Toddlerwise Book
Babywise Book
Baby Sleep Solutions
The Highly Sensitive Child Book
The Wonder Weeks Book
Childwise Book
Pottywise Book
Preschoolwise Book
Toddlerwise Book
Babywise Book

As the book puts it:

“…your baby goes through a whole set of changes that affect his senses- the way he experiences the world, the way he feels, even the way he digests his food. His whole world feels, looks, smells, and sounds different.”

The Wonder Weeks (van de Rijt and Plooij), page 46

As a result, he’s using a lot more energy figuring things out, and taking it all in. He’s more alert, and just wanting to be up longer.

But that doesn’t mean he’s not tired and needing to sleep!

William had a harder time going to sleep and was more fussy at the starts of nap times- especially during the witching hours (6 pm – midnight was his hardest time).

Prior to this leap, he was also very restless the last hour of his naps. I’ve noticed that this has decreased.

Once he’s finally asleep, he’s sleeping longer.

Once he was out of his leap, and out of his most recent growth spurt (in the 6th week), he was a bit more tired. Almost just in recovery mode.

Now we seem to be coming out of recovery mode, and he is just very alert and happy and enjoying all of his new skills.

He even decided to roll from his belly to his back shortly after this leap! Super early!

I’m always excited to see what the next developmental leap brings. Leap 2 will be arriving around week 8! Check back to the leaps and milestones page to see his progress updates!

What is leap 1 versus wonder week 5?

Leap 1 is the first developmental leap in your baby’s life! It occurs around week 5 of his/her life, which is why it’s referred to as wonder week 5. wonder weeks 5 leap 1 1

What are the wonder weeks?

The wonder weeks are a series of developmental milestones that occur at predictable times in your baby’s life.

Are the wonder weeks based on due date or birth date?

The book states that the wonder weeks are based on due date. I have found with both of my babies, however, that they follow based on birth date. Plug both dates into the wonder weeks app and track each for awhile until you figure out which your baby is following.

Wonder weeks leap 1 – How long does it last?

It varies, of course! Some babies it lasts for up to a week, and some only a day or two.

Wonder weeks leap 1 – Earlier than expected?

Your baby might just be following the wonder weeks based on their birth date instead of their due date. I found this to be true with both of my children.

Wonder weeks leap 1- Crying baby?

Your baby may be extra fussy during this time. It will pass quickly. Focus on the new skills they are learning to see if they are in this first wonder week.

Wonder week leap 1- Sleep not happening for your baby?

Your once super sleepy baby is now not wanting to nap? If that sounds right, your baby might be in this first mental leap!

How useful was this post?

Click on a star to rate it!

Average rating 5 / 5. Vote count: 23

No votes so far! Be the first to rate this post.