How-to Guide

How to Track Your Child’s Growth Milestones

Percentiles get misread constantly. Here’s what the numbers actually tell you — and what to log between checkups.

Not medical advice: Percentiles and milestones vary widely between healthy children. Discuss any concern directly with your pediatrician rather than comparing against general guidance.

What growth percentiles actually mean

A 60th percentile for weight means a child weighs more than 60% of children the same age and sex — it says nothing about whether that’s healthy on its own. What pediatricians actually watch is the child’s own curve over time: a consistent percentile is usually reassuring; a sudden jump or drop across percentile lines is what prompts questions.

Developmental milestones by age, broadly

  • By 12 months: sitting, crawling, first words, standing with support
  • By 24 months: walking, simple phrases, following basic instructions
  • By 4–5 years: full sentences, basic self-care, simple social play

These are general ranges, not deadlines — wide variation is normal, and a pediatrician is the right person to interpret any specific concern.

What’s worth logging at home between visits

Height and weight at each pediatrician visit are enough for the growth curve itself — you don’t need to measure at home. What’s worth noting between visits is new milestones as they happen (first steps, first words) with a rough date, since that context is genuinely useful at the next checkup and otherwise gets forgotten.

Keeping the record between visits

Log height and weight as vitals in your child’s MedKeep profile after each checkup, and note new milestones in a visit entry as they happen. Over a few years, that log becomes a genuinely useful reference — both for your own memory and for anything a specialist later asks about your child’s development history.

Frequently asked questions

What does a growth percentile mean for my child?

It compares your child to others their age and sex — a 60th percentile means they’re larger than 60% of peers. On its own it’s not a health verdict; what matters more is whether their own curve stays consistent over time.

What developmental milestones should I track by age?

Broadly: sitting and first words by around 12 months, walking and simple phrases by 24 months, full sentences and basic self-care by 4–5 years — with wide normal variation, so treat these as general ranges, not deadlines.

How do I keep a record of my child’s growth over time?

Log height and weight from each pediatrician visit as vitals in their MedKeep profile, and note new milestones with a rough date as they happen.

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Updated July 19, 2026 · 4 min read
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