The exact cause of endometriosis is unknownóthere may be one primary causative factor, or several factors combined. Excess estrogen in the body seems to worsen the condition, but this, by itself, is not a cause of the disease. The major theories of the cause of this condition are discussed below:

Retrograde Menustration

This theory suggests that the endometrial cells are pushed backward from the uterus through the fallopian tubes and exit into the abdomen. Once there they grow and spread to other parts of the body.

Genetics

There is some evidence suggesting that endometriosis or factors contributing to endometriosis may be hereditary. The condition is often seen amongst women from the same family.

Embryonic Tissue Theory

This theory suggests that the abnormally located endometrial tissue was present when the woman was an embryo, and becomes active later on in her reproductive years.

Immune System Dysfunction

Some have suggested that endometriosis may simply be a part of a larger problem related to the immune system. Those who support this theory point to the fact that women with endometriosis have a higher incidence of other immune related conditions such as allergies, candida and even lupus. Of course, it is also possible that endometriosis is what caused the weakening of the immune system that led to these other conditions.

Lymphatic Distribution

This theory states that endometrial tissue is distributed throughout the body via the lymphatic system.

Environmental Factors

A wide range of environmental factors has been proposed as possibly contributing to endometriosis. The most interesting environmental link has been to the chemical dioxin, which crops up widely in our society. This is why it is so important to lead as chemical-free a lifestyle as possible.