First Year Milestones: A Month-by-Month Guide

Every baby develops at their own pace, and the range of “normal” is wider than most parenting books suggest. This guide covers the milestones you can generally expect in the first year — organized by month, so you can follow along as your baby grows.

Remember: these are averages. A baby who walks at 9 months isn’t “advanced” and one who walks at 15 months isn’t “delayed.” Development isn’t a competition — it’s a journey.

1 month

Your newborn is adjusting to life outside the womb. Everything is new and their primary job is eating, sleeping, and bonding.

Motor skills:

Can turn head side to side while lying down
Strong grasp reflex (grabs anything placed in palm)
Jerky, uncoordinated arm and leg movements
Brief moments of head lifting during tummy time

Senses & cognition:

Focuses on objects 8–12 inches away (roughly the distance to your face while feeding)
Prefers high-contrast patterns and human faces
Startles at loud sounds
Recognizes your voice and scent

Social & language:

Makes throaty sounds
Cries to communicate needs
Calms when held or when hearing a familiar voice
Beginning to show a social smile (usually late in this month)

2 months

The fog starts to lift. Your baby becomes more alert and begins to interact with the world intentionally.

Motor skills:

Smoother movements (less jerky)
Holds head up briefly during tummy time (45-degree angle)
Opens and closes hands
Brings hands to mouth

Senses & cognition:

Tracks moving objects with eyes
Recognizes familiar faces from farther away
Shows boredom if an activity doesn’t change (looks away, fusses)

Social & language:

First real social smiles — these are intentional, not gas
Coos and makes gurgling sounds
Turns toward sounds
Begins to show distinct personalities: some babies are calm observers, others are vocal and active

3 months

A beautiful period of engagement. Your baby is becoming genuinely interactive and expressive.

Motor skills:

Holds head steady when supported upright
Lifts head and chest during tummy time (mini push-ups)
Opens and closes hands intentionally
Reaches for and swipes at dangling objects
Bears weight on legs when held standing

Senses & cognition:

Follows moving objects smoothly in a 180-degree arc
Recognizes familiar objects and people
Hand-eye coordination developing (reaches for what they see)

Social & language:

Laughs! One of the most rewarding sounds in parenting
“Talks” back when you speak to them — taking turns in conversation
Makes a variety of vowel sounds (aaah, oooh, eee)
May show stranger awareness (different reactions to familiar vs. new faces)

4 months

Motor development takes off. Your baby is becoming stronger and more coordinated every day.

Motor skills:

Holds head firmly with no wobble
Pushes up on elbows during tummy time
May begin rolling (usually tummy to back first)
Reaches for and grasps toys with both hands
Brings objects to mouth to explore

Senses & cognition:

Depth perception improving
Enjoys cause-and-effect toys (shake rattle → it makes noise)
Explores objects with mouth, hands, and eyes
Recognizes their own name (may turn toward it)

Social & language:

Babbles with consonant sounds (ba, ma, da)
Squeals with delight
Copies some facial expressions
Enjoys social play — may fuss when play stops

5 months

Sitting is on the horizon and your baby is increasingly interested in the world around them.

Motor skills:

Rolls in at least one direction
Sits with support (tripod sitting — leaning on hands)
Transfers objects between hands
Reaches with one hand accurately

Senses & cognition:

Interested in small objects (raisin-sized — this is also when baby-proofing becomes urgent)
Looks for dropped objects
Explores different textures

Social & language:

Responds to own name consistently
Expresses displeasure clearly (not just crying)
Enjoys looking at themselves in a mirror
May show early signs of separation anxiety

6 months

A major milestone month. Sitting independently opens up a whole new perspective on the world.

Motor skills:

Sits independently (or very close to it)
Rolls both ways
Begins rocking on hands and knees (pre-crawling)
Rakes small objects with fingers
Passes objects from hand to hand smoothly

Senses & cognition:

Understands object permanence is developing (things exist even when hidden)
Responds to emotions in your voice
Curious about everything — wants to touch and taste all objects

Social & language:

Babbling includes more consonant-vowel combinations (bababa, mamama)
Responds to simple words they hear frequently
Shows clear preferences for certain people (usually parents)
May show anxiety around strangers

Also this month: Ready for solid foods (see our solid foods guide)

7–8 months

Mobility is coming. Your baby is determined to get from point A to point B, one way or another.

Motor skills:

Crawling (army crawl, traditional crawl, or scooting — all valid)
Pulls to stand using furniture
Pincer grasp developing (picking up small items with thumb and finger)
Bangs objects together
Claps hands

Senses & cognition:

Object permanence solidifying (enjoys peekaboo — now they know you’re still there)
Explores how things work (drops objects, opens containers)
Responds to “no” (understanding it, if not always obeying it)

Social & language:

Stranger anxiety often peaks around 8 months
Points at objects
Waves bye-bye (may need prompting at first)
First “words” may emerge (mama, dada — often used non-specifically at first)

9–10 months

Your baby is becoming a problem-solver. Watch them figure out how to reach a toy behind a cushion or navigate around furniture.

Motor skills:

Crawls confidently
Cruises along furniture
May stand briefly without support
Picks up small objects with neat pincer grasp
Can put objects into and take them out of containers

Senses & cognition:

Looks for hidden objects (knows they still exist)
Understands simple words and short phrases
Points to ask for things or show you something
Imitates actions after watching you (wiping table, talking on phone)

Social & language:

Developing specific word-meanings (mama = mom, dada = dad)
Understands “give it to me,” “come here”
Shows clear preferences (favorite toy, favorite person)
Separation anxiety may still be strong

11–12 months

The home stretch of the first year. Your baby is becoming a toddler — and it shows.

Motor skills:

Stands independently
May take first steps (range: 9–18 months is normal)
Picks up tiny objects easily
Stacks 2–3 blocks
Uses spoon/fork with help (very messy)

Senses & cognition:

Follows simple instructions (“give me the ball”)
Points at pictures in books when you name them
Tests cause and effect deliberately (throws food to see your reaction… again)
Begins to use objects correctly (phone to ear, cup to mouth)

Social & language:

Says 1–3 words with meaning
Uses gestures intentionally (waving, pointing, shaking head)
Plays simple interactive games
Shows affection to familiar people (hugs, kisses)
May begin to show early signs of independence and frustration (welcome to toddlerhood)

When to talk to your pediatrician

Every baby is different, and most variations in timing are perfectly normal. However, consult your doctor if your baby:

By 2 months: Doesn’t respond to loud sounds, doesn’t watch things as they move, doesn’t smile at people
By 4 months: Doesn’t bring things to mouth, doesn’t push down with legs when feet are placed on a hard surface, has difficulty moving eyes in all directions
By 6 months: Doesn’t reach for things, shows no affection for caregivers, doesn’t respond to sounds, has difficulty getting things to mouth, seems very stiff or very floppy
By 9 months: Doesn’t bear weight on legs with support, doesn’t sit with help, doesn’t babble, doesn’t play any back-and-forth games, doesn’t respond to own name
By 12 months: Doesn’t crawl, can’t stand when supported, doesn’t search for hidden objects, doesn’t say any words, doesn’t use gestures like waving or pointing

Important: If you have concerns at any age, don’t wait for the next scheduled checkup. Early identification and intervention make a significant difference.

FAQ

My baby skipped crawling — is that a problem?

No. Some babies go straight from sitting to cruising to walking. Crawling is not a required milestone. However, tummy time and floor play are still important for developing core strength and coordination.

When should my baby say their first word?

Most babies say their first meaningful word between 10–14 months. “Mama” and “dada” used specifically (not just babbling) count as words. By 12 months, most babies understand far more words than they can say.

My baby isn’t walking at 12 months — should I worry?

Not at all. The normal range for first steps is 9–18 months. Many perfectly healthy babies don’t walk until 14–15 months. If your baby is pulling up, cruising, and showing interest in mobility, walking will come.

How can I support my baby’s development?

The best things you can do are simple and free:

Talk to your baby constantly — narrate your day, describe what you see
Read together daily — even before they understand the words
Floor time — give them space to move, explore, and practice
Respond to their cues — this builds secure attachment, which is the foundation for all development

Sources

Centers for Disease Control and Prevention. (2024). Milestone Tracker. CDC Learn the Signs. Act Early.
American Academy of Pediatrics. (2023). Developmental Milestones. HealthyChildren.org.
WHO Multicentre Growth Reference Study Group. (2006). WHO Motor Development Study: Windows of achievement for six gross motor development milestones. Acta Paediatrica, 95(S450), 86–95.
Sheldrick, R.C., & Perrin, E.C. (2013). Evidence-based milestones for surveillance of cognitive, language, and motor development. Academic Pediatrics, 13(6), 577–586.