2 Month Old Baby

Your 2-month-old: first smiles, cooing, CDC milestones, feeding and sleep.
Average weight at 2 monthsGirls 5.1 kg (11.3 lb)
Boys 5.6 kg (12.3 lb)
Average length at 2 monthsGirls 57.1 cm (22.5 in)
Boys 58.4 cm (23.0 in)

50th percentile (median) on the WHO Child Growth Standards. Healthy babies vary widely around these numbers.

Development at 2 months

Many babies give their first real social smiles around now, and they start to make cooing sounds. Neck muscles are getting stronger during tummy time.

CDC milestones most babies reach by 2 months

  • Calms down when spoken to or picked up
  • Looks at your face
  • Seems happy to see you when you walk up
  • Smiles when you talk to or smile at them
  • Makes sounds other than crying
  • Reacts to loud sounds
  • Watches you as you move
  • Holds head up when on tummy
  • Moves both arms and both legs
  • Opens hands briefly

Feeding

Feeds may start to settle into more of a pattern. By around 1 to 2 months, many formula-fed babies take about 120 mL (4 oz) every 3 to 4 hours.

Breast milk or formula is all your baby needs until around 6 months. Feed when your baby shows hunger cues, such as rooting, sucking on hands or turning towards the breast. Breastfed babies usually need a vitamin D supplement: the AAP recommends 400 IU a day. Work out formula amounts with our Baby Feeding Calculator.

Sleep

Night sleep is still broken up by feeds. Babies may begin to sleep a slightly longer stretch at night. Always put your baby down on their back, on a firm, flat surface with no pillows, bumpers or loose blankets. The AAP recommends sharing your room, but not your bed, for at least the first 6 months.

Your checklist this month

  • Book the 2-month check-up and vaccinations, following your country’s schedule.
  • Keep up daily tummy time.
  • Talk, sing and read to your baby.

Is your baby growing well?

Check weight, length and head size on WHO charts with our Baby Growth Percentile Calculator, or work out your baby’s exact age with the Baby Age Calculator.

When to get medical help

  • A temperature of 38°C (100.4°F) or higher in a baby under 3 months
  • Breathing that is fast, noisy or hard work
  • Fewer wet nappies than usual or refusing feeds
  • Unusually sleepy, floppy or hard to wake
  • A rash that does not fade when pressed with a glass
  • Repeated vomiting, or green vomit

In an emergency, call your local emergency number.

Based on WHO and CDC guidance. Every baby develops at their own pace.