1. What is Normal Ovary Volume Ultrasound?

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

Purpose: It helps healthcare professionals assess ovarian size, which is important for evaluating reproductive health and detecting abnormalities.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Volume of ovary (cm³)
• \( L \) — Maximum length (cm)
• \( W \) — Maximum width (cm)
• \( H \) — Maximum height (cm)

Explanation: The formula approximates the ovary as an ellipsoid, using the three orthogonal measurements obtained from ultrasound.

3. Importance of Ovarian Volume Measurement

Details: Ovarian volume assessment helps in diagnosing conditions like polycystic ovary syndrome (PCOS), ovarian cysts, and monitoring ovarian reserve.

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: What is the normal range for ovarian volume?
A: In premenopausal women, normal ovarian volume typically ranges between 5-15 cm³, varying with age and menstrual cycle phase.

Q2: Why use the ellipsoid formula?
A: The ellipsoid formula provides a reasonable approximation of ovarian volume using standard ultrasound measurements.

Q3: How accurate is this calculation?
A: While not perfect, it provides a clinically useful estimate with about 85-90% accuracy compared to more complex methods.

Q4: When would ovarian volume be abnormal?
A: Volume may increase with PCOS (typically >10 cm³), ovarian cysts, or tumors, and decrease with menopause or diminished ovarian reserve.

Q5: Should both ovaries be measured?
A: Yes, both ovaries should be measured separately as they may differ in size due to physiological or pathological reasons.