Baby development

More Baby development

Magical moments in development

Baby girl in her nursery sitting on the floor playing with toys
When will my baby sit?

Most babies sit between four and seven months but it all starts with head control. Find out how your baby will build the strength and balance to sit up unsupported.

When will my baby roll over?

When will my baby crawl?

When will my baby cut his first tooth?

When will my baby be able to roll a ball back and forth?

See all in Magical moments in development

Your baby's development month by month

Four month old baby looking at a soft, colourful book with mom
Your four month old's development

As your baby reaches four months, his stomach has grown bigger so he doesn't need to feed so often -- just four or five times a day. But he'll still gain weight.

Watch this newborn grow one amazing second at a time: video

A second a day: from three months to six months (video)

A second a day: from six months to nine months (video)

A second a day: baby's first year (video)

See all in Your baby's development month by month

Physical development

Crawling baby reaching out to close the door
Developmental milestones: Crawling

Crawling helps your baby strengthen her muscles enough to walk and is her first way of getting around efficiently on her own.

Baby milestones: one to six months

Baby milestones: seven to 12 months

Developmental milestones: Rolling over

Developmental milestones: Sitting

See all in Physical development

Your baby's senses

Baby sitting with parents playing with toys
Can I help my baby’s senses develop through play?

Everyday activities such as playtime, nappy changing and feeding are a great opportunity to develop your baby’s sense of touch, smell, hearing, sight and taste.

Developmental milestones: Sight

Developmental milestones: Hearing

Why does my baby put everything in her mouth?

Bonding through the senses: video

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Social and emotional development

Baby with mom and grandmother
Developmental milestones: separation and independence

When will your baby know where you end and she begins? At birth she thinks she's a part of you and doesn't have a sense of herself as an individual.

My 7-week-old doesn't smile yet. What's wrong?

Developmental milestones: Socialization

When will my baby smile for the first time?

Can I predict my baby's temperament?

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Learning and communication

Developmental milestones: Understanding words, behaviour, and concepts

Inside a child's mind: A visual guide

When will my baby start remembering things?

Baby signing

Brain development: is the difference between boys and girls all in their heads?

See all in Learning and communication

Your child's timeline: when milestones happen

Mother holding standing baby's hands to help her stay upright
Your child's walking timeline

These are the steps your child will take on the path to becoming a confident walker.

Your child's sleep and naps timeline

Your child's teething timeline

Your child's talking timeline

Sleeping timeline: Your child's development (video)

See all in Your child's timeline: when milestones happen

Developmental concerns and questions

My baby is always wiggling. Is she uncomfortable?

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Your baby's growth

Growth charts: Taking your baby's measurements

Growth charts: Understanding the results

Your child's size and growth timeline

Tracking your baby's growth

Understanding your baby’s growth

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Track your baby’s development

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