0-12 Months

Infancy

Your baby's first year is a special period full of rapid development, discovery, and many new experiences. We are here for you with expert advice and practical guides.

Official Sources Reliable Content Up-to-date Info Practical Tips

0-12 Months

Infancy

Your baby's first year is a special period full of rapid development, discovery, and many new experiences. We are here for you with expert advice and practical guides.

Official Sources Reliable Content Up-to-date Info Practical Tips

What Happens in This Period?

Key milestones across your child's developmental areas

Physical Development

Experiences rapid progress in growth, weight gain, muscle development, and motor skills.

Cognitive Development

Explores senses, increases learning capacity, begins to recognize surroundings.

Emotional Development

Develops trust, strengthens attachment, begins to express emotions.

Social Development

Smiles, responds to sounds, begins to communicate and form social bonds.

10-12 Months(1 items)

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A mother supporting the adjustment between the new baby and the older child

Relationships & Communication

Sibling Jealousy When You Have a New Baby (0–12 Months)

A new baby changes family routines, and older siblings may react with frustration or confusion. Learn how to support every child while protecting your infant and keeping the peace at home.

6 min read|0-12 Months

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Popular Topics

Sleep & Rest

Sub Topics

Sleep schedule & routine · Falling asleep independently · Night wakings · Naps · Sleep regressions & transitions · Safe sleep

8Sub Topics

4Content

Sleep regressions & transitions

Nightmares, night terrors & snoring

Not enough sleep & daytime tiredness

A baby sleeping under a blanket in a wooden crib in a sunlit room, with a plush toy beside them and a round clock on the wall.

How many naps do babies need by age? A month-by-month nap chart

Naps step down as babies grow. Find your baby's month in one chart: the usual number of naps, how long each one lasts and when the next transition tends to arrive.

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A parent makes the room calm and safe for a baby's daytime nap

Featured

Daytime Naps for Babies 0–12 Months

Learn how to support your baby’s changing daytime sleep needs from birth to 12 months without rigid schedules. Discover how to recognize tired cues, create safe sleep routines, and adjust naps as your baby grows.

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Tools for this age

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Calculators, schedules and checklists — sign in and the results are saved to your child's profile.

Baby percentile calculatorWhere does your child's weight and height sit among children the same age? See it in seconds on the WHO growth curves.

Baby and child sleep scheduleHow much should your child sleep in 24 hours, and when should bedtime be? Calculate it from official guidance and compare it with your own log.

Baby milestones by monthCheck off what most children your child's age can do, and talk about the rest with your doctor.

Baby vaccine schedulePick your country, enter the birth date, and see the official schedule as your own dates.

Baby teething chart: order and timelineEnter the date of birth to see the typical eruption window of all 20 baby teeth, the next tooth and the teeth already through — on one screen.

Baby feeding schedule: weaning chart by monthEnter your country and the date of birth: when to start solids, meals and textures by age, and until when to avoid certain foods — with dates.

What temperature is a fever in children?See whether the temperature you measured counts as a fever according to your country's official health source, when to get help at your child's age and the warning signs.

Child Height Predictor & Genetic Target Height CalculatorHow tall will your child be as an adult? Enter both parents' heights to calculate the pediatric mid-parental target height and expected adult height range using the Tanner and AAP formulas.