Transviginal Ultrasound Assessment of Normal Ovarian Volume among Women of Reproductive Age in Jos, Nigeria

Objective: This study was to evaluate the normal ovarian volume among women of reproductive age using transvaginal ultrasound and correlating it with different age groups, parity and BMI.

Methodology: A hospital-based cross-sectional descriptive study. The data were obtained from 347 selected clinically and sonographically healthy non pregnant women. Sonographic examination was done using LOGIC 5 machine fitted with a 7.5 MHz transvaginal transducer. The right and left ovarian volume of each patient was measured. The mean ovarian volume was classified into five different age groups, four categories of BMI as well as different parities and the results were analyzed.

Results: The mean ovarian volume was 7.9±2.1 cm3. The average volumes of the left and right ovaries were 8.0±2.0 cm3 and 7.7±2.2 cm3 respectively. Statistical significant difference between the left and the right mean ovarian volume was noted (p=0.00). Ovarian volume showed a trend of decline after reaching its peak at the second decade of life. Negative correlation was shown between ovarian volume and parity (p=0.02). There was no statistical significant difference in ovarian volume related to BMI (p=0.74).

Conclusion: These values represent the normal average ovarian volume for the local population.