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Child growth reference
WHO growth-standard medians birth to 5 years, AASM sleep ranges by age with a bedtime window, and the Tanner mid-parental height prediction — each with its source and its limits.
Growth charts and sleep ranges describe populations, not your child. The measurement that matters is the child's own growth curve, read by the child-health professional who knows the child. Anything worrying — stalled weight, breathing pauses in sleep, a measurement that jumped curve — is a reason to contact them, not to consult this page.
| Topic | What it gives you |
|---|---|
| Weight and height medians | WHO P50 lines, boys and girls, birth to 5 years. |
| Sleep by age | AASM ranges plus a bedtime window from your wake time. |
| Predicted adult height | The Tanner mid-parental method, with its wide ± range. |
Sources: WHO Child Growth Standards · AASM consensus recommendations for sleep · checked 2026-09-03
Frequently asked questions
Is my child normal?
Almost always yes — and this page is built to say it honestly. The WHO values are medians: half of healthy children sit below them, half above. A child on the 25th percentile line is not 25% healthy.
What should I do with these numbers?
Compare against the child's own previous measurements, ideally with the health professional who keeps their growth book. A single measurement is a dot; the curve is the information.
Where do the numbers come from?
The WHO Child Growth Standards (weight and height medians, 0-5 years) and the American Academy of Sleep Medicine consensus ranges. The adult-height predictor is the Tanner mid-parental method used in clinical practice.
A growth book that lives with you
TempoLife keeps weight, sleep and routines in one place — the trend your child-health professional will ask about.