What is the normal size of the uterus in centimeters?

For women, the uterus is a vital organ primarily responsible for reproduction. Uterine size is also critically important; both an abnormally large or small uterus can adversely affect overall health and even impair reproductive function. Therefore, it is essential to understand the normal uterine dimensions, monitor any changes in the uterus, and seek timely treatment for abnormalities. So, what is the normal uterine size in centimeters?

What is the normal uterine size in centimeters?

Under normal circumstances, the uterine body measures approximately 6–7 cm in length, 3–4 cm in width, and 2 cm in thickness. The uterine volume is about 5 mL, and its weight is roughly 50 g. These measurements fall within the normal range. Marked deviations—particularly enlargement—may indicate underlying conditions. Uterine enlargement is commonly observed during pregnancy. Additionally, conditions such as adenomyosis or uterine fibroids may also cause uterine enlargement. A definitive diagnosis requires comprehensive evaluation integrating clinical symptoms and ultrasound findings.

A small uterus (hypoplastic uterus) is often caused by hormonal imbalances. Such underdevelopment can further disrupt hormone secretion, leading to menstrual disorders including dysmenorrhea, oligomenorrhea, and amenorrhea. If the uterus is reduced in size by less than 15% and the sum of its three diameters measures 12 cm—with all other anatomical features remaining normal—spontaneous vaginal delivery remains feasible in many cases. However, if the degree of hypoplasia exceeds this threshold or if other health-related factors are compromised, infertility may result. Moreover, not only is the conception rate lower in women with a small uterus, but the diminished uterine volume and thin endometrium also increase the risk of embryonic arrest and spontaneous abortion following conception.

In daily life, cultivating healthy lifestyle and dietary habits is highly recommended. We hope this information proves helpful to you.