Your child's development from birth to four years: Your ultimate guide

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From birth to age four, your child goes through remarkable development on all fronts. Keep track of what to expect every single month with this handy article.

Observing baby development stages month by month, is certainly a great source of joy to all parents. But do you know exactly what to expect across all realms of your little one’s growth and health: physical, social-emotional, speech and language, cognitive and nutrition?

As you go through these crucial baby development stages month by month — from the moment your baby is born right up until he or she is ready to start pre-school — are you aware of red flags to watch out for? 

Yes, it’s a lot of work and research… and can be overwhelming. Which is why we’ve done the legwork for you, bringing you all baby development stages month by month — zero to 48 months to be precise — in one handy article. 

As you scroll down, you’ll find links to 51 articles (the first month is broken down by week) spanning birth to age four. Each article gives you a detailed description of your baby’s overall development, including vaccination reminders and when you should bring your baby to the doctor. 

Let’s start with your baby’s first year of life. 

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What can you expect in your baby’s first year of life?

Baby Development Stages Month By Month: Zero to 12 

When looking at baby development in your baby’s first year, an astonishing amount of growth and development takes place. 

Within the first couple of months, you’ll see your baby’s beautiful personality play peek-a-boo. Your heart will melt with love as that first gummy smile is flashed at you… and it’ll keep melting at every little adorable thing your baby does. 

One of the main things you’ll notice about your little one in their baby development stages month by month (zero to 12 months), is their rapid growth in both height and weight.

Most babies double their birth weight by five to six months of age. And by the time they are a year old, their birth weight has usually tripled.

A baby’s brain also undergoes immense growth during this period, and for the first six months, much of it is fuelled by the best brain food in the world: your breastmilk!  

In this first year, many significant “firsts” will be achieved, such as your baby’s first taste of solid food, first smile and probably their first steps and words! Who’s proud now?

For an in-depth read of baby development stages month by month, from week one to 12 months, just clink on the relevant link below. Don’t forget to read about when vaccinations are due:

Week one

Week two                       

Week three                   

One month

Two months                 

Three months             

Four months                 

Five months

Six months                   

Seven months               

Eight months               

Nine months

Ten months                 

Eleven months             

Twelve months

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From those first tentative steps at around 12 months, be amazed at how mobile your baby gets by age 24 months!

Baby Development Stages Month By Month: 13 to 24

What?! Who’s this big baby and where is that tiny newborn? That’s right – your sweet baby is growing up right before your eyes.  

You now are officially mum and dad of a toddler! As we follow baby development stages month by month, this  year of your little one’s life heralds many more exciting changes. 

By the time they are 24 months old, your baby will most likely be able to walk and run. They’ll be speaking the most adorable baby talk and their personality will shine through clear and bright.

Your little one’s sleep should settle into a predictable pattern this year, and they’ll develop their own quirky tastes when it comes to food and drink.

Remember their brains are still developing at a speedy pace, so you want to fuel this with plenty of nutritious food, and emotional and cognitive stimulation. 

Let’s take an in-depth look at baby development stages month by month, 13 months to 24:  

13 months       

14 months           

15 months               

16 months 

17 months       

18 months           

19 months               

20 months

21 months       

22 months           

23 months               

24 months 

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Why hello little chatterbox!

Baby Development Stages Month By Month: 25 To 36

Hello Terrible Twos! Welcome to the year of tiny and not-so-tiny tantrums, big personalities and an abundance of love! 

Much has been said and written about toddler tantrums. So much, in fact, that you might feel anxious about managing your little one’s emotions this year.

And while it’s true that sometimes they can be extreme, most of the time a tantrumming toddler can easily be calmed down with a few tricks. So don’t stress yourselves too much, parents. 

Tantrums aside, in summary, this year will see further rapid holistic development in your tot. They might have lost that characteristic baby chubbiness by now and will have long limbs and strong bodies.

Their gross motor skills are quite advanced but you’ll still need to help them hone their fine motor skills, such as grasping and using a pencil correctly.

Read about your toddler’s exceptional development across all areas this year, month by month:

25 months         

26 months       

27 months         

28 months

29 months         

30 months       

31 months         

32 months

33 months         

34 months       

35 months         

36 months

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Your babies are growing so fast! Soon, they’ll be ready for preschool.

Baby Development Stages Month By Month: 37 To 48         

Congratulations, mums and dads! You’ve done an amazing job of raising your baby so far. You’ve weathered through the worst of those tantrums (and are probably pros at handling them!). Now, you can be prepared to be rewarded with calmer and more rational behaviour from your mini-me.

This year, your little one will likely start pre-school. They’re regular little chatterboxes and will happily ask you a zillion questions each day. From a helpless newborn to a proper little person — look at how far they’ve come! 

Want to know more about how they’ll develop every month this year? 

37 months     

38 months       

39 months     

40 months 

41 months     

42 months       

43 months     

44 months

45 months     

46 months       

47 months     

48 months

Mums and dads, your little one’s journey to greatness has just begun and you’re doing such a great job at nurturing them so they develop into wonderful people. Remember along the way, if you have any doubts regarding your child’s health, you should always consult with a paediatrician. 

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