How does endometriosis affect pregnancy?

It normally doesn't: Endometriosis can cause problems with getting pregnant due to scarring that can affect the tubes or involve the ovaries so that the egg and sperm can't meet. It can increase your risk of a tubal pregnancy since it is harder for the fertilized egg to move down to the uterus. There are also chemical changes that can do both those things.Once you are pregnant, endometriosis is inactivated.