What is the normal size of the ovaries in millimeters?

Aug 31, 2021 Source: Cainiu Health

Dr. Li Qiang

Introduction

In women of childbearing age, the ovaries measure approximately 40 mm × 30 mm × 10 mm (i.e., 4 cm × 3 cm × 1 cm), weigh 5–6 g, and have a grayish-white surface. After menopause, the ovaries gradually atrophy, becoming smaller and firmer. Ovarian dimensions outside this normal range may indicate an ovarian cyst; therefore, it is essential to determine whether an ovarian cyst is present.

For women, many pay close attention to the health and size of their ovaries, as an ovarian size outside the normal range may indicate underlying disease. So, what is the normal ovarian size in millimeters? Below, we address this question.

2_Copy1 (16).jpg

What Is the Normal Ovarian Size (in mm)?

In women of childbearing age, the normal ovarian dimensions are approximately 40 mm × 30 mm × 10 mm—equivalent to 4 cm × 3 cm × 1 cm—with a weight of 5–6 grams. The ovarian surface appears grayish-white. After menopause, the ovaries gradually atrophy, becoming smaller and firmer. Ovarian dimensions exceeding this range may suggest ovarian cysts, warranting further evaluation to confirm or rule out their presence. Generally, the sizes of the left and right ovaries differ slightly in healthy women; typically, the right ovary is slightly smaller than the left. Understanding the normal ovarian size helps women interpret findings during routine gynecological examinations more confidently.

1 (62)_Copy1.jpg

Additional Information: Symptoms of Ovarian Cysts

1. Menstrual Irregularities

Most ovarian cysts are asymptomatic in early stages. Clinically, common manifestations include lower abdominal discomfort or pain, increased vaginal discharge that is yellowish and malodorous. Additionally, patients may experience menstrual irregularities, such as unpredictable cycle length or abnormally heavy menstrual flow.

2. Abdominal Mass

Patients may detect a firm, non-tender mass in the lower abdomen. In the absence of complications or malignancy, this mass is typically mobile—often palpable and movable from the pelvic cavity into the abdominal cavity. Pain during intercourse may occur. When nausea or inflammation develops, mobility of the mass becomes restricted.

The above outlines the normal ovarian size in millimeters. We hope this information is helpful to you.

View All

What is the normal ovarian size range for a 7-year-old girl?

The normal ovarian volume range for a 7-year-old girl is 2.5–3 cubic centimeters. In female infants, ovarian volume is less than 0.7 cubic centimeters at birth. Follicular development can be observed by 6 months of age, with follicle diameters generally under 6 millimeters, and typically remain relatively unchanged before the age of 6. At age 7, girls usually have follicles measuring 5 to 10 millimeters in diameter, with ovarian volume generally ranging from 2.5 to 3 cubic centimeters.