Causes of Endometriosis
The exact causes of endometriosis are still not fully understood. Researchers believe that several factors—genetic, hormonal, immune, and environmental—may work together to trigger the condition. While the precise cause may differ from person to person, certain theories offer insight into how endometriosis develops.
Retrograde Menstruation
One leading theory is retrograde menstruation. In this process, menstrual blood flows backwards through the fallopian tubes into the pelvic cavity instead of out through the vagina. This blood contains endometrial cells that can attach to pelvic organs, continue to grow, and bleed with each cycle.
However, retrograde menstruation alone does not explain why some people develop endometriosis while others do not—since it happens to many without causing disease. This suggests other factors play a role.
Genetic Predisposition
Endometriosis tends to run in families. If your mother or sister has the condition, you’re more likely to develop it too. Certain genes may make it easier for endometrial tissue to implant and grow outside the uterus.
Immune System Dysfunction
A faulty immune response may allow endometrial-like tissue to survive in areas where it shouldn’t. Normally, the body would clear these misplaced cells. In endometriosis, this defence system seems to malfunction, leading to chronic inflammation and pain.
Hormonal Factors | Causes of Endometriosis
Oestrogen appears to promote the growth of endometrial tissue. People with higher oestrogen levels or a heightened sensitivity to this hormone may be more likely to develop endometriosis. Hormonal imbalance can also make symptoms more severe.
Surgical Scars and Cell Transformation
Endometrial cells may also implant in scars following surgery (such as C-sections) or transform from other types of tissue through a process called metaplasia.
In South Africa, delayed treatment and limited access to early screening tools contribute to the underdiagnosis of the condition. Increased public awareness and access to menstrual health education can help reduce the burden of disease in both rural and urban communities.
Understanding the causes of endometriosis helps guide both prevention and management strategies. While we cannot always prevent the condition, knowing your risk factors can encourage earlier investigation and treatment.
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