Your baby’s developmental milestones by month during the first year are delightful (the coos and those cuddles!) and dizzying (the crying and feeding and diapering, you’ve got your hands full).

Here’s our guide to your baby’s first year and all its major milestones (first smile, giggle, step, and words), challenges (colic and teething and diaper rash, oh my!) and much more.

Newborn babies up to 1 week old

I love Sleeping

Your new-born baby will likely be sleeping for 13 to 16 hours a day. They will usually only waking every two to four hours for something to eat so be prepared for them to be waking you up a lot through the night!

Testing my reflexes

Your baby’s developmental milestones at 1-week will be seen in different reflexes. Two common reflexes are rooting and sucking.

An interesting fact

Most new-born babies leave hospital weighing less than when they were born. Your little bundle of joy will have been putting on as much weight as possible just before you gave birth.

This is a survival instinct that helps prepare baby for its new world and is an important baby developmental milestone. 

Your Baby at 2 weeks of age


Breastfed babies can eat as much as they want and they are very good at self-regulating food quantity. If you express, follow the 11 to 33 ounces of breast milk and a 15 to 31 for formula-fed cuties.

Observation behaviours

At 2 weeks old, your baby is observing everything going on around her (this is known as the quiet alert mode). A common baby developmental milestone this week will be their manoeuvring actively and through making some tiny sounds (this is known as the active alert mode).

An interesting developmental fact

Most fair-skinned cuties are born with either deep blue or slate-coloured eyes. Those beautiful darker-coloured cuties tend to have dark brown eyes but these may change as they grow into infancy.

Your baby at 3 weeks of age

Night time

Your new-born baby will likely be sleeping for 13 to 16 hours a day. They will only wake every two to four hours for something to eat!

Look at my muscles, Mum!

Muscle control is starting to happen this week so your baby’s movements and reflexes will start to become smoother and much more graceful.

An interesting fact

Be aware that one in four newborns have crying fits that can last for hours.

Your baby at 4 weeks of age

How is feeding coming along?

Your baby should be working towards 11 to 33 ounces of breast milk if breastfed and a 15 to 31 for formula.

Being understood

In week 4 you should find that you can decode your baby’s different types of crying to understand what your baby is trying to tell you.

An interesting fact

Your little baby will now be growing a rate of around 3 to 8 ounces a week across the first twelve weeks of its life.

Newborn baby looking at colours and shapes

Your baby at 2 months


No need to switch things up here. Your baby should still be around 11 to 33 ounces of breast milk if breastfed and a 15 to 31 for formula.

Playing with your baby

Your baby’s developmental milestones really kick in at 2 months. You should now be helping your baby develop and learn through plenty of sensory-stimulation. Use bright coloured toys when interacting with your baby and introduce them to different sounds and textures.

Remember that babies can easily become overstimulated at this age and you don’t want to give them a reason to stay up all night wishing they were still playing Bobby, the luminous pink fluffy dog. ?

An interesting fact

Separation anxiety doesn’t exist yet and your baby is not yet developed enough to be nervous of new people. A good time to get in lots of cuddles with other family members!

Your baby at 3 months

Sleeping patterns

There should be no changes to your baby’s sleeping needs at 3 months and they will still need 13 to 18 hours of sleep a day and unfortunately will still be waking every two to four hours for something to eat!

Did my baby just laugh?

Probably! Most babies laugh out loud for the very first time in their lives around 3 months of age. As beautiful as that sounds, be careful. Babies also start to roll over and look to face the direction of the sound.

An interesting fact

Hugging your baby will help it with its mental development.

Your baby at 4 months

Sleeping patterns


Things start to change up at 4 months. You may find your baby has redcued their sleep to around 9 to 11 hours a day, waking only for feeds.

Look at my arms!

At 4 months your baby will be starting to reach its arms out towards its stomach and above its head. Another baby developmental milestone will see them try to roll over with their arms.

An interesting fact

Try and gently stand your baby up, holding them by the waist. Why? Well, half of all babies at 4 months can place weight on their legs when supported by an adult!

Your baby at 5 months

Feeding basics

Still no need to change your baby’s food intake at five months. Your baby should still be on 11 to 33 ounces of breast milk if breastfed and a 15 to 31 for formula.

Game playing

Your baby might not be ready for a game of chess at 5 months but they will certainly be very keen to play games. Peek-a-boo and hide-and-seek both being popular choices. At five months many babies start to understand objects and things disappearing (such as your smiling face!).

An interesting fact

Some babies are ready for weaning earlier than the recommended six months.

Some babies will devour a little tablespoon of baby cereal, or oatmeal, mixed with 3 to 6 teaspoons of your breast milk/formula.

You can try this a couple of times of day but its fine to wait until the recommended six months of course.  

Your baby at 6 months


Six months is a big milestone in the development of your baby. It is now the recommended time to introduce your baby to solid food. Read more about weaning your baby here.

All I want for Christmas is my two front teeth!

Some babies start to develop their first tooth around six months.

Don’t be concerned if your baby doesn’t, remember each baby is an individual.  Now is the time to buy that first toothbrush and some infant toothpaste. Introduce your little one to the joys of brushing its teeth! So cute.

An interesting fact

Most babies will be sitting up unsupported at six months of age, although some babies start even earlier.

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