Endometriosis affects roughly 1 in 10 women of reproductive age, yet it remains one of the most misunderstood conditions in women’s health. Many women live with the pain for years before getting a proper diagnosis, partly because the exact cause of endometriosis is still not fully understood. Doctors and researchers have identified several likely explanations, and understanding them can help women recognise symptoms earlier and seek the right care.
What Exactly Is Endometriosis?
Endometriosis occurs when tissue similar to the lining of the uterus, called the endometrium, starts growing outside the uterus. This tissue can attach itself to the ovaries, fallopian tubes, or the outer surface of the uterus, and in rarer cases, even to the bladder or intestines. Like the normal uterus’s lining, this misplaced tissue thickens, breaks down, and bleeds with each menstrual cycle. But unlike a normal period, this blood has no way to leave the body, which leads to inflammation, scarring, and often intense pain.
Possible Causes of Endometriosis
1. Retrograde Menstruation
Retrograde menstruation is the most widely accepted explanation. During a period, some menstrual blood flows backwards through the fallopian tubes into the pelvic cavity instead of leaving the body. This blood carries endometrial cells, which can implant and grow on pelvic organs. Not every woman who experiences retrograde menstruation develops endometriosis, though, which tells us other factors are involved too.
2. Genetics
Genetics play a role too. Women with a mother or sister who has endometriosis face a noticeably higher risk of developing it themselves. Researchers believe certain inherited genes may affect how the body regulates hormones or manages inflammation, making some women more susceptible.
3. Immune System Dysfunction
In a healthy body, the immune system typically identifies and clears away misplaced endometrial cells. When this process doesn’t work as it should, those cells are allowed to grow undisturbed outside the uterus.
4. Hormonal Influence
Hormonal influence, particularly oestrogen, is known to fuel the growth of endometrial tissue. This is why symptoms often ease after menopause, when oestrogen levels naturally drop.
There’s also a theory involving cellular transformation, where cells outside the uterus, in areas like the abdominal lining, transform into endometrial-like cells under certain hormonal triggers.
Who’s More Likely to Get It?
Certain factors do raise the risk. Starting periods at a young age, having shorter menstrual cycles, heavy or prolonged periods, and never having given birth are all associated with higher endometriosis risk. Structural issues in the reproductive tract that block normal menstrual flow can also contribute.
When to See a Doctor
If periods come with pain that disrupts daily life, or if you’re facing unexplained difficulty conceiving, it’s worth getting checked rather than assuming it’s “just bad periods.”Top gynaecologists in Bangalore at centres like Apollo Cradle often see how early diagnosis can make a real difference in managing symptoms and protecting fertility down the line.
Endometriosis isn’t caused by one single factor. It’s usually a combination of genetics, hormones, immune response, and menstrual patterns working together. The more women understand the causes of endometriosis, the sooner they can advocate for themselves in a doctor’s office.
