This version was machine-translated from German and has not been medically reviewed. The authoritative version is the German version.

Olsen 2010 Growth Calculator

Intrauterine curves (USA): weight, length, head circumference 23–41 weeks

About this calculator

Percentiles and z-score of weight, length and head circumference according to the intrauterine growth curves of Olsen 2010 (23–41 completed weeks).

Postmenstrual age = gestational age at birth + age since birth. For classification at birth (SGA/AGA/LGA), completed weeks are customary; here the curves are interpolated to the day.

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Reference and license

Olsen 2010 – 23–41 completed weeks.
Olsen IE, Groveman SA, Lawson ML, Clark RH, Zemel BS. New intrauterine growth curves based on United States data. Pediatrics. 2010;125(2):e214–e224. License: publication (AAP); LMS tables from the R package childsds (GPL applies to the software, not to the reference data). Source
Support points for each completed week of gestation; values between weeks are linearly interpolated.

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Note

Calculation aid for healthcare professionals. Percentiles and z-scores describe the position of a measured value in the reference population; clinical assessment remains with the treating physician.

Review date of the German original: 2026-11-05 · Methodology

Frequently asked questions

Olsen 2010 Growth Calculator: What does this calculator compute?

Percentiles and z-score of weight, length and head circumference according to the intrauterine growth curves of Olsen 2010 (23–41 completed weeks).

Olsen 2010 Growth Calculator: Which sources is this calculator based on?

Olsen IE, Groveman SA, Lawson ML, Clark RH, Zemel BS. New intrauterine growth curves based on United States data. Pediatrics. 2010;125(2):e214–e224.