What a percentile actually means
A percentile describes a position within a specific reference population. It is not a grade, diagnosis or reassurance about an individual child; the named reference, measurement quality and trend all matter.
Resources
Explainers, written for parents
Short, careful pieces on the concepts that come up in a paediatric appointment. Educational only — none of this replaces advice about your own child.
Why the trend matters more than one dot
Single measurements carry error: a full nappy, a different scale, a wriggling toddler. What clinicians look at is the shape of the line over time, and whether it is holding its own course.
Z-scores in one paragraph
A z-score expresses distance from the median of a named reference in standard-deviation units. Its meaning depends on the correct source table, age, sex and measurement; it is not a diagnosis.
Corrected age for preterm babies
Corrected age adjusts chronological age for prematurity. AVYOMI keeps chronological age visible and applies corrected age for a child born more than three weeks early where the growth or checklist context needs it.
Milestone windows, not deadlines
Milestones are usually described with age bands rather than exact deadlines. The applicable band and wording must come from a named framework; concerns about an individual child belong with a qualified professional.
How immunisation schedules are built
Published schedules define dose sequences and timing rules. Delays and catch-up decisions depend on the applicable schedule and the child's circumstances, so AVYOMI does not invent or generalise those rules.
A note on sources
Every live feature names its source
WHO growth, CDC development, IAP ACVIP 2023 and India's U-WIN schedule are published as checksum-locked source data. AVYOMI never fills gaps with demo or invented values.