5 Months Old Development
Content reviewed against published CDC, WHO, AAP guidelines
Last reviewed:
Your baby is building strength for sitting and may be rolling both ways. Everything goes in the mouth as oral exploration peaks.
Key takeaways
- Rolls both ways (tummy to back and back to tummy)
- Looks at objects closely and examines them
- Stranger awareness begins (may be wary of unfamiliar people)
- Still primarily breast milk or formula.
- Sleeps 12-15 hours total.
“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
- Rolls both ways (tummy to back and back to tummy)
- Sits briefly with support or tripod sitting (hands on floor)
- Transfers objects from one hand to the other
- Brings feet to mouth
Cognitive development
- Looks at objects closely and examines them
- Drops objects intentionally to watch them fall
- Responds to own name by looking
- Recognizes partially hidden objects
Social & emotional
- Stranger awareness begins (may be wary of unfamiliar people)
- Enjoys looking at self in mirror
- Squeals, growls, and makes raspberries
- Shows preference for familiar caregivers
Feeding
Still primarily breast milk or formula. Some pediatricians may suggest introducing single-ingredient purees. Watch for readiness signs.
Sleep
Sleeps 12-15 hours total. May sleep 6-8 hour stretches at night. Transitioning to 3 naps per day.
Common concerns at this age
Activities to try
- Supported sitting practice on the floor
- Water play during bath time with cups and pouring
- Name objects and people throughout the day
- Read touch-and-feel books
Frequently asked questions
What should a 5 months old be doing?
How much should a 5 months old sleep?
How much should a 5 months old eat?
What activities help a 5 months old develop?
Bottom line
Every baby develops at their own pace. The milestones listed for 5 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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