Skip to content

Endometriosis Health Center

Font Size
A
A
A

Endometriosis - Cause

The exact cause of endometriosis is not known. Possible causes include the following:

  • Your immune system may not be getting rid of endometrial cells outside of the uterus like it should.
  • Heavy bleeding or an abnormal structure of the uterus, cervix, or vagina causes too many endometrial cells to go up through the fallopian tubes camera.gif and then into the belly. (This is called retrograde menstruation).
  • Blood or lymph fluid may carry endometrial cells to other parts of the body. Or the cells may be moved during a surgery, such as an episiotomy or a cesarean delivery.
  • Cells in the belly and pelvis may change into endometrial cells.
  • Endometrial cells may have formed outside the uterus when you were a fetus.
  • It may be passed down through families.

WebMD Medical Reference from Healthwise

Last Updated: March 12, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
Next Article:

Today on WebMD

Endometriosis Overview
Slideshow
mature woman with serious expression
Article
 
Distracted woman
Article
healthtool pregnancy calendar
Article
 
pelivic pain slideshow
Article
teen girl looking at question mark
Article
 
uterus and inlay of fibroids
Article
woman talking to doctor
Article
 
Doctor discussing screening with patient
Article
young woman with thoughtful expression
Article
 
contraceptive pills
Article
Teenage girl with heat pad on stomach
Article
 

WebMD Special Sections