Developmental milestones at 9 months
Here's what most children are doing at 9 months, across key areas of development. Every child grows at their own pace — think of these as a guide, not a checklist. Want to see how your own child is doing?
Take the free 2-minute check →Social/Emotional
- Stranger wariness — Wariness of strangers shows your child can tell familiar people from new ones.
- Shows facial expressions — Varied facial expressions show your child is developing a range of emotions.
- Responds to name — Responding to their name shows hearing, attention, and social connection.
- Reacts when you leave — Reacting when you leave shows a healthy attachment to caregivers.
- Enjoys peek-a-boo — Enjoying peek-a-boo shows social play and early memory skills.
Language/Communication
- Babbles repeated sounds — Repeated babbling sounds are direct practice for first words.
- Lifts arms to be picked up — Raising arms to be picked up is communication through gestures.
Cognitive
- Looks for dropped objects — Searching for dropped objects shows your child understands things still exist when hidden.
- Bangs objects together — Banging objects together shows two-hand coordination and cause-and-effect learning.
Movement/Physical
- Gets to sitting — Getting to sitting alone shows strong core muscles and motor planning.
- Transfers between hands — Passing objects between hands shows both hands and both sides of the brain working together.
- Rakes food with fingers — Raking food builds the finger control needed for self-feeding.
- Sits without support — Independent sitting frees the hands for play and exploration.
What if my child isn't there yet?
Milestones are ranges, not deadlines — children reach them at different times and that's normal. If your child is missing several milestones for their age, or something feels off, it's worth a quick check and a conversation with your paediatrician. The free ProParents check gives you a clear, private snapshot in two minutes — and a simple activity to try.
Check your child's development →Frequently asked questions
What are the key milestones at 9 months?
At 9 months, milestones span movement, language, thinking, and social-emotional development. Every child is different — this page lists what most children are doing, based on CDC guidance.
My child isn't doing all of these — should I worry?
Children grow at their own pace and milestones are ranges, not deadlines. If your child is missing several, or you have concerns, a quick check and a chat with your paediatrician is a good next step.
How can I support my 9 months old's development?
Small, consistent daily interactions matter most. Take the free 2-minute ProParents check to see where your child is and get a simple activity to try today.