Baby Wonder Weeks – What is the Grey Period?

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Following baby wonder weeks? Find out what the wonder weeks grey period is (also called the stormy period).

Also find a complete wonder weeks chart at the end of this post! Each leap, wonder week, title, and the abilities are outlined!

Find out what the wonder weeks grey period is.

Baby Wonder Weeks Grey Period

Something I wish I had done all along was track our progress through each wonder week. It is definitely in the plans to do so going forward. I find it fascinating that these developmental milestones are so predictable and seem to have been spot on for our daughter, Caroline, and so far our son, William, as well!


We read the next chapter in the Wonder Weeks book before we reach every leap, so we are prepared and know what to expect. I also downloaded the app for the short and sweet version of what’s going on right now.

The app has an amazing chart that gives you a visual as to where your baby is in relationship to these leaps.

the wonder weeks book

The book recommends going by the baby’s due date. When I got the app, I plugged in two different “kids”:

  1. The first was Caroline based on her due date.
  2. The second was Caroline based on her birth date.

I track both just in case. For us, her birth date has been spot on with hitting these milestones, so this is now the one that we focus on when looking at the chart. William also followed based on his birth date.

Read all LEAPS & MILESTONES here.

I wrote my first post about Leaps and Wonder Weeks when Caroline was in leap 5. This was the first leap that we really noticed a significant increase in her fussiness.

With the other leaps, we would see that she was checking off the boxes, learning the skills that each particular leap would bring, but it never really impacted her all that much with regards to her temperament and behavior.

We could tell that she was learning, and she would be a bit fussier than normal, or perhaps a bit more exhausted, etc., but never anything very dramatic.

So… the wonder weeks and the grey period. What is it?

Baby wonder weeks chart grey period according to the app.

You’ll notice that around week 28.5-30.5 (shortly after leap 5) there is a grey period or stormy period listed in the chart. It is not officially referred to as a wonder week or a leap, but it is highlighted on the chart.

The book does not explain what the grey period is (as far as I can find anyway).

If you click on the chart legend at the top right of the screen in the app, however, it gives this explanation for the “grey period”:

“Fussy and irritable behavior at around 29 or 30 weeks is not a telltale sign of another leap. Your baby has simply discovered that his/her mommy can walk away and leave him/her behind. Funny as it may sound, this is progress. It is a new skill: your baby is learning about distances”. 

During leap 5, we saw an obvious reaction from Caroline when we would put her to bed and walk away.

She was very aware of the fact that we were leaving and no longer by her side. She resisted putting herself to sleep as a result.

During the grey period, right after leap 5, the concept of not wanting Mama to be far away was up front and center. William experienced the same reaction at this same time!

Neither child wanted me out of their sight, and didn’t want me focused on anything but them.

Baby wonder weeks grey period and what it is.

There was a solid week or so that I couldn’t even cook dinner. The grey period is all about distance for sure!

I would bring her with me into the kitchen, set her down, and she would just start crying and screaming immediately. She wanted me focused on her and holding her.

She also decided that she wanted to change her schedule during this period. I think part of this stemmed from not wanting to be away from Mama. As the day went on, she would get more fussy and clingy.

This is typical behavior for babies, but it seemed to be magnified during this grey period.

The catnap that is in the late afternoon hours (4/4:30 pm) was her fussiest time of day. For a couple of months she had been resisting the catnap, but would eventually give in.

Find the Wonder Weeks Book and Other Parenting Favorites Here:

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

During the grey period, however, she flat out refused the catnap. I had to be holding her and she would maybe take a 5 minute snooze, but that was it. She wanted to be up.

So, we dropped the catnap (click here to read more about how we did so).

She has also had several moments of needing assistance being put to sleep (for both naps and bedtime).

She would resist, and since this is abnormal behavior for her, I chose to help soothe her and help her get to sleep.

She would snuggle right into me the minute I picked her up. She just wanted Mama snuggles.

She would plant her face right in the sweet spot between my shoulder and neck. She would hold on tight, close her eyes and start sucking.

She was happy and content- as long as she was in my arms. I got some of THE BEST CUDDLES during this period.

Obviously, while these are amazingly sweet moments, it was also a frustrating and difficult time.

Not being able to put your baby down to get her food ready, etc., can take its toll on you and be very tiring. It was an exhausting couple of weeks, for sure.

Independent playtime was nonexistent, the catnap was now nonexistent, and putting herself to sleep without assistance seemed to be a thing of the past.

As frustrating as all of that was, she started reaching out for Mama during these weeks, and, I swear, she was saying “Ma- Ma” all the time!

My heart just melts to see her reach out for me and say Mama.

To see her able to express with her body that she wants to be picked up was so amazing. And, obviously hearing her say Mama was pretty awesome as well.

Maybe she just added “M” to her vocabulary, and maybe she doesn’t understand or mean to say “Mama” yet, but I’ll take it!

Baby wonder weeks grey period- what it is.

As soon as the grey period was finished, both of my children were back to doing independent playtime, and allowing me to set them down. They both got back to putting themselves to sleep easily and without assistance.

In the moment for Caroline transitioning out of the grey period, I wrote:

“I can walk away from her and get some things done, and she is ok with that.

She looks for me and makes sure she knows where I am, but is content even if she can’t see me.

She has continued to show me when she wants me by crying out and reaching her arms up.

She is back to being able to put herself to sleep (most times), and is still really enjoying cuddle time, but not NEEDING it as often.

She gives kisses and hugs, and is growing into such a sweet little girl.”

So, while I am happy to move out of this grey period due to its challenges, I am also going to miss the extra cuddles that I got while we were in it.

Luckily, she is continuing to give cuddles, just not demanding them.

Next on her list of skills to check off is definitely pulling herself up and supported standing.

In the past few days (just as we finished the grey period), she’s shown more of an interest in standing.

She is not pulling herself up yet, but if I stand her up she is now able to hold on and stand on her own for several minutes!

She is also extremely interested in inspecting Mama, Daddy, and the dogs. She pulls at our ears, in particular right now (the dogs’ ears included).

Leap 6, here we come! I can’t wait to see what it brings!

Find all of our posts on leaps, wonder weeks, and milestones at this link!

Leaps and milestones - a complete list of baby and toddler milestones.

Wonder Weeks Chart

Leap: The developmental leap that you are on (simply by number)

Wonder week: The relative week during your baby’s life that this leap is occurring. (onsets may vary by a week or two)

The Wonder Weeks Book and app were referenced when making this table.

Make sure to click on each tab below. Each tab is a summary of the leap and what to expect, and links to the full detailed post I have on it.

The World of Changing Sensations

-Responds more to touch
-Looks at things longer
-Smiles for the first time
-More alert 
-Notices odors

wonder week 5 leap 1

Read in depth about our experiences with leap 1 here.

The World of Patterns

-Turns head toward sounds
– Sits forward on lap
– Touches toys
– Discovers parts of body
– Looks at interesting 
– Makes more sounds
– Holds head up easily

wonder weeks leap 2

Read in depth about our experiences with leap 2 here.

The World of Smooth Transitions

– Follows with eyes
– Turns head smoothly
– Rolls from tummy to back
– Shakes rattle
– Finds things funny
– Enjoys light
– Enjoys sound fluctuations

leap 3 wonder week 12

Read in depth about our experiences with leap 3 here.

The World of Events

– Very active
– Grasps well
– Puts your hand in his mouth
– Responds to name
– Uses more consonants
– Reacts to mirrors
– Searches to find you
– Pushes food away when done
– Gets frustrated and impatient

The World of Relationships

– Shows interest in people 
– Focused on details
– Lifts things
– Imitates sound
– Protests if you walk away

The Stormy Period

Baby discovers “distance” and realizes that Mama can walk away and leave.

The World of Categories

– Understands words
– Recognizes himself
– Starts to try crawling
– Exaggerates moods
– Plays peek-a-boo

The World of Sequences

– Answers questions
– Points
– Repeats games
– Imitates gestures

The World of Programs

– Grabs clothes
– Puts things away
– Bathes doll
– Observes what you do
(cooking, eating, getting ready)

The World of Principles

– Practices facial expressions
– Wants to do things independently
– Thinks ahead
– Temper tantrums
– Understands mine and yours
– Negotiates
– Irrational fears

The World of Systems

– Increase in word comprehension
– Sense of time
– Learns rules of what belongs to who
– Understands extended family
– Can console others
– Shows their independence and “power” over themselves

Wonder Weeks and Leaps

See our children's progression through each of the wonder weeks and leaps.

What is the grey period or stormy period?

The grey period is not a developmental leap. It is however, one of the most fussy and irritable times in your baby’s first year (which is why it’s referred to as the stormy period). This is when your baby realizes that you can walk away from him/her! For a detailed look at this stormy period, read the full post here.

What are the wonder weeks?

The wonder weeks are 10 leaps that occur during the first year of your baby’s life. These weeks are leaps of developmental changes that occur at predictable times.

What is the wonder weeks chart?

This chart can be found by downloading the wonder weeks app. It gives a brief description of each leap, when it happens, and what to expect.

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Hi there! I’m Katrina (aka Mama). I am a former engineer and chemistry teacher, turned stay at home mom and mom blogger. I have been blogging since 2015, and have taken my love of engineering and science, and tried to applied many of the same methods to my parenting adventure. I am not only a hard working mom and blogger, I am the author of Baby Sleep Solutions, and have more books on the way!

I have a huge passion for Babywise and similar methods that prioritize sleep for our children. I am mom to 3 (including one angel baby that had trisomy 13). A huge mission of mine is to share her story and legacy. I am a big believer in being real and doing what works for YOUClick here to subscribe to my weekly newsletter to follow our story.  This blog is intended to be our story and our ideas- including successes and failures along the way.

You can also find me published at Today Parenting, Her View From Home, VitamedMD, Love What Matters, and The Mirror. Follow me on Facebook and Pinterest for more parenting tips and to hear more about our journey!

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