Stephen J. Schueler, M.D.

Overview Symptoms Evaluation Treatment D and C questions for doctor specialist Home Care stress warning signs Underlying Cause Anatomy

Menometrorrhagia Anatomy

To better understand irregular menstrual periods, it helps to understand the anatomy of the uterus and cervix.

The female reproductive organs include the vagina, cervix, uterus, fallopian tubes and ovaries. The lining of the uterus is called the endometrium.

Before ovulation, the endometrium grows and becomes thick: the endometrial tissue and blood vessels support the fertilized egg when it enters the uterus.

During ovulation, an egg is released from one of the ovaries and enters the fallopian tube. If the egg is fertilized as it passes through the fallopian tube, it attaches to the endometrium on the inside of the uterus. The endometrium continues to support the fertilized egg as it grows.

If the egg is not fertilized, the egg does not attach to the endometrium and the endometrium breaks down. The uterus sheds the endometrium, which causes the bleeding associated with the menstrual period.

Anatomy examples:

  • The uterus, cervix, and vaginal canal
  • The bladder
  • The fallopian tubes:
    • These paired structures connect each ovary to the uterus
  • The ovaries:
    • One on each side of the uterus. A normal adult ovary is about the size of an unshelled almond
  • Female organs during a pelvic examination

Last Updated: Nov 1, 2008 References
Authors: Stephen J. Schueler, MD; John H. Beckett, MD; D. Scott Gettings, MD
Copyright DSHI Systems, Inc. Powered by: FreeMD - Your Virtual Doctor

PubMed Menometrorrhagia References
  1. Ballard L, Lyon DS, Jones JL. Inpatients with menometrorrhagia: etiologies, treatments, and outcomes. South Med J. 2000 Jun;93(6):571-4. [10881771]
  2. Browner-Elhanan KJ, Epstein J, Alderman EM. Evaluation of irregular menses in perimenarcheal girls: a pilot study. J Pediatr Adolesc Gynecol. 2003 Dec;16(6):365-8. [14642958]
  3. Haver MC, Locksmith GJ, Emmet E. Irregular menses: an independent risk factor for gestational diabetes mellitus. Am J Obstet Gynecol. 2003 May;188(5):1189-91. [12748474]
FreeMD is provided for information purposes only and should not be used as a substitute for evaluation and treatment by a physician. Please review our terms of use.