All stages

Week by Week

Everything below is written for breastfeeding.

Month 4 · one-glance sheet

Month 4

More laughing, more reaching, and often worse sleep. The sleep part is a sign of growth, not a step backward.

Just these three, this week

  1. 1
    Breast milk or formula only is
    Still the plan for most babies at this age.
  2. 2
    On the back
    On a firm flat surface, in their own clear sleep space.
  3. 3
    A few sturdy
    Graspable toys within easy reach during play.

How much milk

5–6
feeds / day
on cue
amount
3–4 h
typical gap

Milk is still the main event. Around 6 months, solids start alongside — not instead of — milk feeds.

Draft figures for this age, pending clinical review.

Call someone today if

Trust the worry. None of this is an overreaction.

  • A temperature of 100.4°F (38°C) or higher, rectally — call the same day at this age.
  • Not yet smiling at people, or not making any sounds by 4 months.
  • Not able to hold their head steady when upright, or not bringing things to their mouth.
  • Not pushing down on their legs when their feet are on a firm surface.
  • Seems very stiff or very floppy, or does not respond to loud sounds.

If you want the detail

← Week 12Month 5 →

Drafted from public sources — see the full source list. This is not medical advice — call your pediatrician with any concern.