What is the normal size of the uterus?

The uterus is the organ responsible for embryo and fetal development as well as menstruation. It is pear-shaped and oriented upside-down. So, what is the normal size range of the uterus?

Normal Uterine Size Range

The normal uterine size range is as follows: weight approximately 55–75 g; length 6–9 cm; width 5–6 cm; thickness 3–4 cm; and capacity about 5 mL. The uterus is generally divided into two parts: the uterine body (corpus) and the cervix. The uterine body is broader and occupies the upper portion of the uterus. Its dome-shaped top is termed the fundus, while the lateral extensions of the fundus are called the uterine horns. The ratio of uterine body to cervix varies with age and ovarian function: 1:2 during puberty, 1:1 during the reproductive years, and 2:1 after menopause.

In pregnant women, polycystic-appearing ovarian morphology and polycystic ovary syndrome (PCOS) may occur. Polycystic-appearing ovarian morphology refers to the presence of numerous small follicles in both ovaries—typically more than 13 follicles per ovary, each measuring less than 1 cm in diameter. In contrast, PCOS is an endocrine disorder characterized by chronic anovulation and hyperandrogenism. While polycystic-appearing ovarian morphology can be a feature of PCOS, not all individuals with PCOS exhibit this morphology, nor does polycystic-appearing ovarian morphology always indicate PCOS.

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