Neyzi 2008 percentile
A Turkey-specific national reference. Positions height and weight against peers. Always free.
Height prediction & growth
Predict adult height by reading five methods together, not one number.
No method alone is definitive; each gives a range. Child Growth shows Mid-Parental Height, Khamis-Roche, Bayley-Pinneau and AI bone age alongside the Turkey-specific Neyzi 2008 reference. When methods converge, confidence rises; when they diverge, that is a signal to talk to a clinician.
Reviewed by Scientific Board Last reviewed: 2026-05-30
This page is educational. Height predictions are reference-based ranges; they do not replace a pediatric endocrinology examination.
5 methods, one table
5Which method fits depends on the data you have. In most cases, reading several together is healthiest.
Mid-Parental Height
Computes a genetic target height from parental heights. Fast and intuitive. Always free.
Khamis-Roche
Estimates from height, weight and parental heights without bone age. Practical for first screening.
Bayley-Pinneau
Based on bone age; uses skeletal maturity directly. Valuable in suspected early/late puberty.
AI bone age
Estimates bone age from a hand-wrist image and compares it against Greulich-Pyle (second opinion).
Height prediction & growth articles
10These cluster articles explain the methods and growth tracking in depth.
Why not trust a single method?
Each method relies on different data and carries a different margin of error. The real signal is in their agreement, not a single estimate:
- Mid-Parental Height gives the genetic ceiling but doesn’t see maturation.
- Khamis-Roche needs no bone age; it can drift in early/late developers.
- Bayley-Pinneau relies on bone age; it depends on correct reading.
- AI bone age provides a Greulich-Pyle second-opinion comparison.
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Evidence base
Sources and references
This page is built on guidance from the leading international child-health authorities and reviewed by our Scientific Board.
- 1Neyzi et al.·Reference values for weight, height, head circumference (Turkey, 2008/2015)
The Turkey-specific growth reference used on the platform.
- 2Khamis & Roche·Predicting adult stature without skeletal age
The original Khamis-Roche method.
- 3Bayley & Pinneau / Greulich-Pyle·Skeletal maturity and adult height prediction from bone age
Bone-age-based prediction foundation.
- 4WHO·Child growth standards
International growth monitoring reference.
Frequently asked questions
Which height prediction method is most accurate?
There is no single “best” method. The right one depends on your data, and reading several together is healthiest. When methods converge, confidence rises.
Can height be predicted without bone age?
Yes. Mid-Parental Height and Khamis-Roche need no bone age. If bone age exists, Bayley-Pinneau and AI bone age add maturation to the picture.
Does height prediction give a definitive result?
No. Each method gives a range and carries error. Results are reference-based estimates; for a definitive assessment, see a pediatric endocrinologist.
Which reference is used for Turkey?
The platform uses the Turkey-specific Neyzi 2008 national percentiles, which fit the local population unlike international references.