Different measurement methods produce different numbers for the same night. What that means for how much weight to put on a tracked figure.
4 min read
The AASM sleep-duration consensus starts at 4 months. What that means for newborn sleep numbers, and what is actually worth watching in the first weeks.
The 75% threshold behind every milestone checklist, what the CDC 2-month list actually contains, and how to read a milestone a baby has not reached yet.
3 min read
Growth charts explained: the 8,440-child WHO study behind them, the six countries involved, and the difference between a growth standard and a growth average.
When do babies start solids? The WHO age recommendation, the meal-frequency targets that come with it, and how few families worldwide actually meet them.
How far parent-reported infant sleep drifts from objective measurement, and what that gap means when several people share the care of one baby.
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