Normal Size of Uterus


Egg fertilization and child development takes place in the uterus, which is the largest organ of the female reproductive system. The activity of gestation is processed entirely within the uterus. The health of this organ is fundamental to the health of the woman and of her growing child. With this in mind, there may be some readers who are interested in knowing what the normal size of the uterus is. Our article will explain what size is normal, and possible reasons for the changing size of the uterus.

The Normal Size of Uterus

Prior to puberty, the average, normal size of the uterus is about 3.5 centimeters by 1 centimeter. The uterus shape is not yet pear shaped, and the thickness of the uterine walls is slim.

During puberty, the uterus changes its shape and takes the shape of a pear. The average size of a healthy uterus at this age is 7.5 centimeters by 4.5 centimeters. The thickness of the uterine wall will increase to 3 centimeters. Throughout the menstrual cycle, the uterus will vary in volume between 75 to 200 cubic centimeters. This means that the average, normal uterus is about the size of her fist and may weigh between 100 to 200 grams.

Pregnancy changes everything, as the uterus must grow substantially to contain and nourish the growing child. At the end of the pregnancy, the uterus can expand to five times its normal size. This means an increase of nearly 500 times its normal volume. Not counting the placenta and child, the uterus weighs nearly 15 times as much as it did before pregnancy occurred.

When the child is born, the uterus will begin to return to the size that it was before pregnancy. The uterus may shrink to a size that is smaller or larger than its previous size. By the time pregnancy is possible again, the uterus will likely be the size of the woman’s fist once again.

Reasons for Larger than Normal Size of Uterus

1. Adenomyosis

Endometrial tissue may be implanted on the uterine wall, which causes an enlarged uterus due to inflammation. The enlargement of the uterus due to adenomyoisis will be symmetrical. This may result in unpleasant or painful sensations during intercourse and cause periods to become irregular. Adenomyosis is a condition that affects nearly one fifth of women around the world.

2. Fibroids

Leoimyoma, or a uterine fibroid, is a benign tumor may be located anywhere on the uterus. It forms due to smooth muscle cell proliferation. Fibroids will grow as asymmetrical lumps on the uterus.These may be described as pelvic tumors, and they appear in nearly 70% of women who have reached 46 years of age. Uterine fibroids may cause irregular period, infertility, unpleasant or painful sensations and bleeding.

3. Cancer

Sadly, uterine cancer affects nearly a tenth of post menopausal women. Uterine cancer will enlarge the uterus, and it may cause discomfort, pain and post-menopausal bleeding. Uterine cancer may cause a lump or asymmetrical enlargement of the uterus. Women who have not yet experienced menopause may also get uterine cancer, though it is less likely.

Reasons for a Smaller than Normal Size of Uterus

1. Menopause

During menopause, hormone production diminishes and causes the uterus to shrink in size. This is a normal occurrence and is not commonly associated with discomfort or pain.

2. Dropped Uterus

If the uterus is prolapsed or dropped, the the size of the uterus will decrease. Symptoms may be mild or severe. Heaviness or fullness is a common complaint. Urine leakage, the inability to fully urinate, constipation, vaginal tissue discharge, unpleasant sensations, and pain may be experienced by those with severe symptoms.

3. Post-Pregnancy

After pregnancy, the uterus will decrease in size. Because of the relatively large size of the uterus during pregnancy, women may experience the sensation that the uterus is small than normal. Hormone fluctuations may also cause the uterus to feel smaller or deflated at times.


Contact your medical professional if you feel any engorgement or shrinkage of your uterus. Mentally record the size and shape of your uterus throughout your cycle. If you notice any lumps or unusual changes, then make an appointment with your doctor. It is better to treat reproductive concerns as early as possible.


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