What is the normal size of the uterus?

The uterus is an internal reproductive organ in females, primarily divided into the uterine body and cervix. Its main functions are pregnancy and menstruation; uterine development begins during embryogenesis. When a fetus undergoes 4D color Doppler ultrasound examination around 24 weeks of gestation, the fetal uterus can be visualized. So, what is the normal size of the uterus?

What is the Normal Size of the Uterus?

In adult women, the normal uterine dimensions are as follows: longitudinal diameter >5.5 cm but <7.5 cm; transverse diameter 4.5–5.5 cm; myometrial thickness 2–3 cm; and uterine cavity volume approximately 5 mL. However, these values are not absolute. In women with prior pregnancies—especially after childbirth—the uterus may be slightly enlarged. If the uterine volume is markedly smaller than normal, uterine hypoplasia should be considered preliminarily; this condition severely impairs fertility and may result in infertility. Conversely, if the uterine volume is significantly larger than normal, common causes include uterine leiomyomas (fibroids) or adenomyosis.

The uterus is a female reproductive organ responsible for embryo and fetal development as well as menstruation. It is centrally located within the pelvic cavity, anterior to the bladder.

In daily life, patients should maintain a positive mindset, actively cooperate with their physicians during treatment, take prescribed medications on time and in the correct dosage, and pay attention to routine self-care—thereby facilitating prompt improvement of their condition. We hope this information has been helpful to you.