9-Month Baby Development: Crawling, First Words, Separation Anxiety

At 9 months, babies' mobility explodes. They explore the world by crawling and start saying meaningful first words.

Physical Development

Weight and Length

• Weight: Average 17-20 lbs
• Length: About 27-28 inches
• Head circumference: About 17.5 inches

Motor Development

Crawling Most babies crawl actively. Styles vary:

• Commando crawl (army crawl)
• Hands and knees crawling
• Bottom shuffle

Pulling to Stand

• Pulls up on furniture
• Bounces while holding on
• Can't stand alone yet

Finger Use

• Pincer grasp for small objects
• Tries finger feeding
• Bangs objects together for sound

Cognitive Development

Object Permanence Complete

Fully understands things exist even when hidden.

• Finds hidden toys
• Enjoys peek-a-boo even more
• Looks when asked "Where did it go?"

Cause and Effect

• Understands buttons make sounds
• Learns balls roll when pushed
• Repeats actions to confirm results

Imitation

• Waving bye-bye
• Clapping hands
• Copying simple actions

Language Development

First Words Begin

• Meaningful sounds like "mama", "dada", "baba"
• May not know exact meaning yet
• Uses repetitive syllables

Language Understanding

Understanding is faster than speaking:

• Understands "no"
• Responds to own name
• Reacts to "give me a kiss"

Communication

• Points to desired objects
• Shakes head to refuse
• Uses varied expressions and sounds

Social Development

Separation Anxiety

Separation anxiety peaks around this time.

• Cries intensely when mom leaves
• Strong rejection of strangers
• Normal developmental phase

Attachment

• Attaches to specific toy or blanket
• Clearly distinguishes parents
• Raises arms to be held

Play

• Interested in other babies (parallel play)
• Loves hide and seek
• Understands simple game rules

Feeding Development

Self-Feeding

• Finger foods begin
• Picks up food with fingers
• Practices drinking from cup

Appropriate Foods

• Soft fruit pieces
• Cooked vegetable pieces
• Finely cut meat
• Rice, bread

Meal Habits

• Sits in chair for meals
• Interested in spoon (still clumsy)
• Practices holding cup

Safety (Important!)

When crawling starts, home safety is crucial:

Essential Safety Measures

• Outlet covers installed
• Stair gates installed
• Dressers, bookshelves anchored to wall
• Table corner protectors
• Dangerous items (cleaners, medicines) out of reach

Hazards to Watch

• Small objects (choking risk)
• Hot items and drinks
• Cords, strings (strangulation risk)
• Plastic bags

Warning Signs

Consult pediatrician if:

• No crawling attempts at all
• Needs support to sit
• No response to sounds
• Avoids eye contact
• No babbling

Frequently Asked Questions

Q: Skipping crawling, trying to walk

That's okay! Some babies skip crawling and walk directly. No developmental concern.

Q: Severe separation anxiety

It peaks around 9 months. Consistent goodbye routines help. Reassure that you'll return soon.

Q: Not talking yet

No meaningful words at 9 months is normal. Babbling and communication attempts are what matters.

Q: Waking frequently at night

Separation anxiety can cause night waking to check on mom. Reassure and resettle gently.

Track 9-Month Milestones with BebeSnap

Record big developmental moments:

• First crawling moment
• First words (mama, dada, etc.)
• Day of pulling to stand success
• Save growth records with photos and videos

References

• AAP HealthyChildren - Baby Development: 9 Months
• CDC - Milestones at 9 Months
• Mayo Clinic - Infant Development