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.

0-12 Months(19 items)

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Filter by period and developmental area, or search.

An adult kneels outside a house whose open door glows with warm light, reaching a hand toward a child holding a small purple suitcase.

Family changes & different families

How to adopt a child or become a foster parent: a guide for ages 0-18

Adoption makes you a child's legal parent for good; foster care is temporary and usually aims to reunite the child with their family. Compare the two paths, the home study, and how to talk to your child about it.

8 min read|0-12 Months+5

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A baby in a high chair drinks water from a small open cup held with both hands while a parent steadies it; a water jug, a glass of milk and whole fruit on the table, a honey jar on a high shelf

Feeding & Nutrition

When can babies have water, cow's milk, honey and juice? (0-3 years)

When can babies have water, cow's milk, honey or juice, and how much is enough? A month-by-month drink timeline and daily amounts from the CDC and the American Academy of Pediatrics.

7 min read|0-12 Months+1

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A parent kneeling at a daycare door hugging a small child goodbye while a smiling teacher reaches out a hand in the background

Separation anxiety

Separation anxiety: my child cries when I leave (8 months to 6 years)

Clinging at daycare drop-off, crying the moment you leave the room? Why separation anxiety happens, when it usually fades, a quick goodbye ritual that works and when to talk to your pediatrician.

7 min read|0-12 Months+1

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Children running in a park, one flying a kite, one skipping rope and one chasing a football, with a playground behind them.

Daily Life & Self-Care

How much physical activity do kids need? Guidelines by age

The target changes with age. Find your child's row in the table, learn to tell moderate from vigorous, and see how 60 minutes fits into an ordinary school day.

7 min read|0-12 Months+5

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Flat illustration of a breathing trace on a monitoring card, a saline bottle with drops and a follow-up calendar

Health & Safety

Baby wheezing and working hard to breathe: is it bronchiolitis?

Fast breathing, pulling in at the ribs and short feeds often mean bronchiolitis. Here is what you can watch at home and what needs the doctor or 911 today.

7 min read|0-12 Months+1

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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.

Sleep & Rest

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.

5 min read|0-12 Months+1

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A colorful height chart, a baby scale, a yellow tape measure and a card showing a rising growth curve on a pastel background

Growth & Development

Baby and Toddler Growth 0–3: WHO Height and Weight by Month

Track your baby's and toddler's height and weight from birth to 3: WHO values by month for the first year, how to read the growth chart at 1–3, normal ups and downs, and when to seek help.

6 min read|0-12 Months

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A stacking ring toy in pastel colors, a black-and-white high-contrast card and a yellow rattle on a soft background

Growth & Development

Baby Cognitive Development: 0–12 Months

Learn how cognitive development unfolds in the first year through attention, memory, and problem-solving—all within everyday interactions. Discover responsive ways to support your baby’s growth without relying on screens or products.

6 min read|0-12 Months

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A parent offers a small spoon of first food to a baby sitting upright in a high chair

Feeding & Nutrition

Starting Complementary Feeding Safely at 0-12 Months: A Family Plan

Use readiness signs, iron-rich first foods, safe textures, thoughtful allergen introduction and responsive feeding to build a practical family routine.

7 min read|0-12 Months

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Illustration of a digital thermometer resting on a light blue baby blanket with a small heart on a pastel background

Health & Safety

Fever in a Baby Under 3 Months: When to Go to the ER

A temperature of 100.4 °F (38 °C) or higher in a baby younger than 3 months needs a doctor right away, even if your baby seems fine. Here is what to do.

5 min read|0-12 Months

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

Sleep & Rest

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.

6 min read|0-12 Months

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Parents listen to their child describing their feelings

Emotions & Behavior

Understanding Your Child’s Behavior

Learn how to interpret your child’s behavior as communication shaped by development, needs, and context. Discover practical steps to observe, respond, and support without punishment or diagnosis.

6 min read|0-12 Months+5

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