1. What is Normal Testicular Volume Ultrasound?

Definition: This calculator estimates testicular volume using ultrasound measurements based on the ellipsoid formula.

Purpose: It helps medical professionals assess testicular size, which is important for evaluating puberty, fertility, and various medical conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of testis (cm³)
• \( L \) — Length (cm)
• \( W \) — Width (cm)
• \( H \) — Height (cm)

Explanation: The formula approximates the testis as an ellipsoid and calculates its volume using the three orthogonal measurements obtained via ultrasound.

3. Importance of Testicular Volume Measurement

Details: Testicular volume correlates with spermatogenesis and hormonal function. Normal adult volume ranges from 10-20 cm³ per testis.

4. Using the Calculator

Tips: Enter the three orthogonal measurements (length, width, height) in centimeters obtained from ultrasound. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why use the ellipsoid formula?
A: The testis approximates an ellipsoid shape, making this formula the most accurate non-invasive method for volume estimation.

Q2: What's the normal volume range?
A: In adult males, normal volume is typically 10-20 cm³ per testis, with some variation based on age and ethnicity.

Q3: How does this compare to orchidometer measurements?
A: Ultrasound measurements are more precise than clinical orchidometry, which tends to overestimate smaller volumes.

Q4: When should I be concerned about volume?
A: Volumes <12 cm³ in adults may indicate hypogonadism, while asymmetric volumes may suggest pathology.

Q5: How accurate is this calculation?
A: The formula provides good approximation (±10%) when proper ultrasound technique is used.