1. What is Ovarian Volume Calculation?

Definition: This calculator estimates ovarian volume using the ellipsoid formula based on three orthogonal measurements (length, width, height).

Purpose: It helps radiologists and gynecologists assess ovarian size, which is important for evaluating normal development, polycystic ovary syndrome (PCOS), and other ovarian pathologies.

2. How Does the Calculator Work?

The calculator uses the prolate ellipsoid formula:

Where:

• \( V \) — Volume (cm³)
• \( L \) — Longest dimension (cm)
• \( W \) — Width perpendicular to length (cm)
• \( H \) — Height perpendicular to both length and width (cm)

Explanation: The formula approximates the ovary as an ellipsoid shape, which is the standard method in radiological practice.

3. Importance of Ovarian Volume Measurement

Details: Normal ovarian volume varies by age and reproductive status. Abnormal volumes may indicate PCOS (typically >10 cm³ in adults), ovarian tumors, or ovarian failure.

4. Using the Calculator

Tips: Enter measurements obtained from ultrasound, CT, or MRI in centimeters. All three orthogonal measurements are required.

5. Frequently Asked Questions (FAQ)

Q1: What are normal ovarian volume ranges?
A: Premenopausal women: 5-15 cm³; Postmenopausal women: <5 cm³; Prepubertal girls: 1-3 cm³.

Q2: Why use the ellipsoid formula?
A: It's the standard method in radiology as it provides a good approximation of ovarian volume from 2D measurements.

Q3: How accurate is this calculation?
A: It's an estimate - actual volume may vary by ±10-15% compared to volumetric measurements.

Q4: When should I be concerned about ovarian volume?
A: When volumes exceed 20 cm³ in reproductive-age women or >10 cm³ in postmenopausal women.

Q5: Does this work for pathological ovaries?
A: The formula is less accurate for very irregular ovaries (e.g., large cysts or tumors).