1 in 3six-month-olds have at least one parent-recorded night waking on a typical night.
Sleeping through is not a six-month milestone that most families have already passed: close to a third of six-month-olds in families who record wakings wake at least once on their typical night. The average at this age is 0.64 parent-recorded wakings a night, and it keeps falling month by month.
Same night reconstruction as the night-waking plateau nugget (local time, wakings of 10 to 90 minutes, families who track wakings, autotrack logs excluded). For each baby we take the median number of parent-recorded wakings across their nights at age 167 to 197 days (about 5.5 to 6.5 months, at least three nights) and report the share whose median is 1 or more. Nights from Jan 2025 to Sep 2026; 275,592 babies, 6.77 million nights. Counting every recorded waking of 1 to 240 minutes gives 36.6%. Families who never log a waking are excluded, and parents may not log every waking, so this is a parent-recorded figure, not a clinical count.