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

• Gestational age weeks ↔ days

  32+4 → 228 days and back; weeks as decimals

• Z-score → measured value

  Calculate the measurement from z-score, age and reference curve

• Measured value → z-score

  Calculate the z-score from measurement, age and reference curve

• Z-score ↔ percentile

  Convert z-score to percentile and back (standard normal distribution)

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