About

Accurate assessment of ovarian volume is a cornerstone of gynecological diagnostics, particularly in the evaluation of Polycystic Ovary Syndrome (PCOS) and Ovarian Reserve. Using the simplified ellipsoid formula, clinicians and patients can convert linear 2D ultrasound measurements into a 3D volumetric estimation.

This tool applies the standard coefficient 0.523. It automatically flags volumes exceeding the Rotterdam consensus threshold for PCOS (> 10 mL) and checks for significant asymmetry between left and right ovaries, which can be indicative of pathology such as cysts or tumors.

Formulas

The ovary is modeled as a prolate ellipsoid. The standard formula used in transvaginal or transabdominal ultrasonography is:

V = L × W × D × 0.523

Where V is Volume in mL (cm³), and L, W, D are Length, Width, and Depth in cm.

Reference Data

Status	Normal Volume Range (mL)	PCOS Warning Threshold
Reproductive Age	4.0 − 9.8	> 10.0 mL
Post-Menopausal	1.2 − 5.8	> 8.0 mL
Pre-Pubertal	0.7 − 3.0	N/A

Frequently Asked Questions

For reproductive-aged women, a volume greater than 10 mL is typically associated with polycystic ovaries (PCO), provided no dominant follicle or corpus luteum is present.

Symmetry is a key indicator of health. While slight variations are normal, one ovary being more than twice the size of the other often requires further investigation for masses or torsion.

No. Ultrasound measurements are operator-dependent. This calculator provides mathematical processing of those measurements but cannot interpret echogenicity or blood flow.