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Cervix

The cervix is the lower end of the womb (uterus). It is at the top of the vagina. It is about 2.5 to 3.5 centimeters (1 to 1.3 inches) long. The cervical canal passes through the cervix. It allows blood from a menstrual period and a baby (fetus) to pass from the womb into the vagina. The sperm travel from the vagina up the cervical canal into the uterine cavity, then into the fallopian tubes to fertilize the egg.

Conditions that affect the cervix include:

A Pap smear is a screening test to check for premalignant (precancerous) changes that can lead to cancer of the cervix. When HPV (human papillomavirus) screening is done, the test specimen is also collected from the cervix.

Review Date: 1/1/2023

Reviewed By

John D. Jacobson, MD, Professor Emeritus, Department of Obstetrics and Gynecology, Loma Linda University School of Medicine, Loma Linda, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

References

Baggish MS. Anatomy of the cervix. In: Baggish MS, Karram MM, eds. Atlas of Pelvic Anatomy and Gynecologic Surgery. 5th ed. Philadelphia, PA: Elsevier; 2021:chap 42.

Cervix. Taber's Cyclopedic Medical Dictionary. 24th ed. F.A. Davis Company; 2021. www.tabers.com/tabersonline. Accessed February 23, 2023.

Gilks B. Uterus: cervix. In: Goldblum JR, Lamps LW, McKenney JK, Myers JL, eds. Rosai and Ackerman's Surgical Pathology. 11th ed. Philadelphia, PA: Elsevier; 2018:chap 32.

National Cancer Institute website. NCI dictionaries. Cervix. www.cancer.gov/publications/dictionaries/cancer-terms/def/cervix. Accessed February 23, 2023.

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Female reproductive anatomy - Illustration Thumbnail

Female reproductive anatomy

Internal structures of the female reproductive anatomy include the uterus, ovaries, and cervix. External structures include the labium minora and majora, the vagina and the clitoris.

Illustration

Uterus - Illustration Thumbnail

Uterus

The uterus is a hollow muscular organ located in the female pelvis between the bladder and rectum. The ovaries produce the eggs that travel through the fallopian tubes. Once the egg has left the ovary it can be fertilized and implant itself in the lining of the uterus. The main function of the uterus is to nourish the developing fetus prior to birth.

Illustration

Female reproductive anatomy - Illustration Thumbnail

Female reproductive anatomy

Internal structures of the female reproductive anatomy include the uterus, ovaries, and cervix. External structures include the labium minora and majora, the vagina and the clitoris.

Illustration

Uterus - Illustration Thumbnail

Uterus

The uterus is a hollow muscular organ located in the female pelvis between the bladder and rectum. The ovaries produce the eggs that travel through the fallopian tubes. Once the egg has left the ovary it can be fertilized and implant itself in the lining of the uterus. The main function of the uterus is to nourish the developing fetus prior to birth.

Illustration

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