Developmental milestones record – 4 months
Typical 4-month-old infants are expected to develop certain physical and mental skills. These skills are called developmental milestones.
All children develop a little differently. If you are concerned about your child’s development, talk to your child’s health care provider.
The typical 4-month-old baby should:
- Slow in weight gain to about 20 grams (almost two thirds of an ounce) per day or 1 and a third pounds (600 grams) per month
- Weigh 2 times more than their birth weight
- Have almost no head droop while in a sitting position
- Be able to sit straight if propped up
- Raise their head 90 degrees when placed on their stomach
- Be able to roll from front to back
- Hold and let go of an object
- Play with a rattle when it’s placed in their hands, but won’t be able to pick it up if dropped
- Be able to grasp a rattle with both hands
- Be able to place objects in the mouth
- Sleep 9 to 10 hours at night with 2 naps during the day (total of 14 to 16 hours per day)
A 4-month-old baby is expected to:
- Have well-established close vision
- Increase eye contact with parents and others
- Have beginning hand-eye coordination
- Be able to coo
- Be able to laugh out loud
- Anticipate feeding when able to see a bottle (if bottle-fed)
- Begin to show memory
- Demand attention by fussing
- Recognize parent’s voice or touch
You can encourage development through play:
- Place the baby in front of a mirror.
- Provide bright-colored toys to hold.
- Repeat sounds the infant makes.
- Help the infant roll over.
- Use an infant swing at the park if the baby has head control.
- Play on the stomach (tummy time).
- Avoid television and other screen time until age 2 years.
Normal childhood growth milestones – 4 months; Childhood growth milestones – 4 months; Growth milestones for children – 4 months; Well child – 4 months.
References
American Academy of Pediatrics Committee on Practice & Ambulatory Medicine. 2024 Recommendations for preventive pediatric health care: Policy statement. Pediatrics. 2024;154(1):e2024067201. PMID: 38910527 pubmed.ncbi.nlm.nih.gov/38910527/.
Marcdante KJ, Kliegman RM, Schuh AM. Normal development. In: Marcdante KJ, Kliegman RM, Schuh AM, eds. Nelson Essentials of Pediatrics. 9th ed. Philadelphia, PA: Elsevier; 2023:chap 7.
Onigbanjo MT, Feigelman S. The first year. In: Kliegman RM, St. Geme JW, Blum NJ, et al, eds. Nelson Textbook of Pediatrics. 22nd ed. Philadelphia, PA: Elsevier; 2025:chap 23.
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