3-Month-Old Baby Development
Summary
Average weight
5.8 kg
Average height
60 cm
Daily sleep
14-16 hours
Feeding interval
3-3.5 hours
Skills Gained This Month
Head control improves markedly; on their tummy your baby can lift their head to 90 degrees and prop on their forearms. They bring their hands together and to their mouth. They make laugh-like sounds and vowels (aah, ooh). Familiar faces get a livelier response.
Feeding
6-8 feeds a day, every 3-3.5 hours. A growth spurt around this month can cause a few days of more frequent feeding; this is not a sign of low supply. More frequent nursing increases supply alongside it.
Sleep
Three to four naps in the day and longer stretches at night. The awake window extends to 1.5 hours. A good period to establish a sleep routine: a short 20-30 minute sequence repeated in the same order each evening is enough.
When To Call The Doctor
Unable to lift their head at all during tummy time at three months
No smiling, or not turning towards sounds
Hands constantly held in tight fists and never opening
Frequently Asked Questions
How often should a 3-month-old baby feed?
A 3-month-old usually feeds every 3-3.5 hours. 6-8 feeds a day, every 3-3.5 hours. A growth spurt around this month can cause a few days of more frequent feeding; this is not a sign of low supply. More frequent nursing increases supply alongside it.
How many hours a day does a 3-month-old sleep?
Total sleep at 3 months is usually 14-16 hours. Three to four naps in the day and longer stretches at night. The awake window extends to 1.5 hours. A good period to establish a sleep routine: a short 20-30 minute sequence repeated in the same order each evening is enough.
How much should a 3-month-old weigh?
The average weight at 3 months is around 5.8 kg, with a height of about 60 cm. These are medians; clear differences between babies are normal. What matters is steady progress along the percentile curve rather than any single measurement.
What can a 3-month-old baby do?
Head control improves markedly; on their tummy your baby can lift their head to 90 degrees and prop on their forearms. They bring their hands together and to their mouth. They make laugh-like sounds and vowels (aah, ooh). Familiar faces get a livelier response.
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When To Seek Care Immediately
Whatever your baby's age, seek medical care without waiting for: a fever of 38 °C or above in a baby under 3 months, a persistent fever above 39 °C at any age, laboured or rapid noisy breathing, blue lips or face, difficulty waking or marked lethargy, inconsolable persistent crying, complete refusal to feed, repeated projectile vomiting, bloody stools, fewer than 6 wet nappies a day, seizure-like movements, or the loss of a skill already gained. In these situations reach real medical care rather than an app or a web search.
This content is for informational purposes only and does not replace medical advice. Always consult your doctor or midwife about your own or your baby's health.