1. What is PHV?

PHV (Peak Height Velocity) refers to the maximum rate of growth in stature during the adolescent growth spurt. It is a key indicator of pubertal development timing.

2. How Does the Calculator Work?

The calculator uses the PHV equation:

Where:

• \( Height_2 \) — Height at later measurement (cm)
• \( Height_1 \) — Height at earlier measurement (cm)
• \( Age_2 \) — Age at later measurement (years)
• \( Age_1 \) — Age at earlier measurement (years)

Explanation: The equation calculates the average growth rate between two measurement points, with PHV representing the peak of this growth velocity during puberty.

3. Importance of PHV Calculation

Details: PHV calculation helps in monitoring growth patterns, assessing pubertal development, and identifying potential growth disorders in adolescents.

4. Using the Calculator

Tips: Enter both height measurements in centimeters and both ages in years. Ensure Age 2 is greater than Age 1 for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical PHV value?
A: Typical PHV values range from 8-12 cm/year in boys and 7-10 cm/year in girls, occurring around ages 13-14 in boys and 11-12 in girls.

Q2: How often should measurements be taken?
A: For accurate PHV calculation, measurements should be taken at regular intervals (e.g., every 3-6 months) during the growth period.

Q3: Can PHV predict adult height?
A: While PHV timing correlates with maturation tempo, multiple measurements over time are needed for accurate adult height prediction.

Q4: Are there limitations to PHV calculation?
A: This method provides an average velocity between two points. More frequent measurements give a better estimate of true peak velocity.

Q5: When is PHV typically reached?
A: PHV usually occurs about 2 years earlier in girls than boys, typically between ages 11-13 for girls and 13-15 for boys.