Everything below is written for breastfeeding.
Longer awake stretches and real back-and-forth sounds — coos and squeals showing up between the cries.
Feeds are longer and further apart as their stomach grows. Growth spurts can bring a few clingier days.
Draft figures for this age, pending clinical review.
Trust the worry. None of this is an overreaction.
If you want the detail
The first real social smile, if it hasn't happened yet — most babies by 2 months, some a little later. Longer nighttime stretches starting to emerge for some babies — not all, and that is still fine.
Drafted from public sources — see the full source list. This is not medical advice — call your pediatrician with any concern.