3 Months Old Development
Content reviewed against published CDC, WHO, AAP guidelines
Last reviewed:
A social turning point. Your baby smiles intentionally, laughs for the first time, and is increasingly engaged with the world around them.
Key takeaways
- Holds head steady when held upright
- Tracks moving objects smoothly with eyes
- Smiles spontaneously and at people
- Feeds become faster and more efficient.
- Sleeps 14-16 hours per day.
“Skills such as taking a first step, smiling for the first time, and waving 'bye-bye' are called developmental milestones. Children reach milestones in how they play, learn, speak, act, and move.”
Physical development
- Holds head steady when held upright
- Pushes up on arms during tummy time
- Opens and shuts hands
- Brings hands to mouth deliberately
- May start to bat at hanging objects
Cognitive development
- Tracks moving objects smoothly with eyes
- Recognizes familiar people from a distance
- Begins to coordinate hand-eye movements
- Shows anticipation during familiar routines
Social & emotional
- Smiles spontaneously and at people
- May laugh or squeal for the first time
- Enjoys playing with others and may cry when playing stops
- Imitates some facial expressions
Feeding
Feeds become faster and more efficient. Breastfed babies may complete a feed in 10-15 minutes. Growth spurt around 3 months may cause temporary increase in demand.
Sleep
Sleeps 14-16 hours per day. May sleep 5-6 hour stretches at night. Naps 3-5 times per day. Circadian rhythm is developing.
Common concerns at this age
Activities to try
- Place toys within reaching distance during tummy time
- Read simple board books with high-contrast images
- Play peek-a-boo (early version with hands over face)
- Let baby grasp and hold a lightweight rattle
Frequently asked questions
What should a 3 months old be doing?
How much should a 3 months old sleep?
How much should a 3 months old eat?
What activities help a 3 months old develop?
Bottom line
Every baby develops at their own pace. The milestones listed for 3 months old are typical ranges based on CDC and AAP guidelines. If your baby hasn't reached a milestone, it doesn't necessarily mean something is wrong — but talk to your pediatrician if you have concerns.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
All content follows our editorial policy and is reviewed against published clinical guidelines.
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