copyright 2008

Introduction

In general, Post-menarchal ovaries measure 2.5-5 cm in length, and 1.5 to 3 cm. in width and depth. Volume generally is Because of the ovary has a variable, usually oval shape, size is best expressed as an estimated volume. Ovarian Volume is estimated as: Volume (ml.) = Length (cm) x Width (cm) x Depth (cm) x 0.52 Using this formula, normal ovarian size is generally Pre-pubertal 0 – 8 ml. Post-pubertal 0-18ml Post- Menopausal 0-8 ml. The Ratio of larger to smaller ovary should normally be less then 2:1 Volume Estimates as a function of age: Age 0 -10 yr. : Mean 1.7 ml. 0.2 – 4.9 ml (95% Confidence Interval) Age 11-20 yr. : Mean 7.8 ml. 1.7 – 18.5 ml. (95% Confidence Interval) Age 21-30 yr. : Mean 10.2 ml 2.6 – 23.0 ml. (95% Confidence Interval) Age 31-40 yr. : Mean 9.5 ml. 2.6 – 20.7 ml. (95% Confidence Interval) Age 41-50 yr. : Mean 9.0 ml. 2.1 – 20.9 ml. (95% Confidence Interval) Age 51-60 yr. : Mean 6.2 ml. 1.6 – 14.2 ml. (95% Confidence Interval) Age 61-70 yr. : Mean 6.0 ml. 1.0 – 15.0 ml. (95% Confidence Interval) This Normal resting Ovary is a non-descript ultrasound structure:

The size of the premenopausal ovary is a dynamic structure that changes in size morphology and blood flow during tghe menstrual cycle

premenopausal 6 ccs (Sample)

post menopausal = 2.5ccs (HAll)

Ovary

Volume: Premenarchal Patients Mean 3.0ml (0.2 – 9.1ml)

Menstruating Patients Mean 9.8ml (2.5 – 21.9ml)

Postmenopausal Patients Mean 5.8ml (1.2 – 14.9ml)

ovary pain cysts discomfort nrmal variant enlarged normal follicles USscan ultrasound copyright 2008 Courtesy Ashley Davidoff MD 83269c.8s |

References

Hall DA, McCarthy KA, Kopans DB. Sonographic visualization of the normal postmenopausal ovary. J Ultrasound Med 1986;5(1):9–11.[Abstract]

Sample WF, Lippe BM, Gyepes MT. Gray-scale ultrasonography of the normal female pelvis. Radiology 1977;125(2):477–483.[Abstract]