Endometriosis is a condition that occurs when the uterine lining (endometrium) grows not only in the interior of the uterus but in other areas, such as the fallopian tubes, ovaries and the bowel. Endometriosis is a complex condition where, the lack or relative absence of an overt anatomical barrier to fertility often belies the true extent of reproductive problem(s).

All too often the view is expounded that the severity of endometriosis-related infertility is inevitably directly proportionate to the anatomical severity of the disease itself, thereby implying that endometriosis causes infertility primarily by virtue of creating anatomical barriers to fertilization. This over-simplistic and erroneous view is often used to support the performance of many unnecessary surgeries for the removal of small innocuous endometriotic lesions, on the basis of such “treatment” evoking an improvement in subsequent fertility.

It is indisputable that even the mildest form of endometriosis can compromise fertility. It is equally true that, mild to moderate endometriosis is by no means a cause of absolute “sterility”.

Rather, when compared with normally ovulating women of a similar age who do not have endometriosis, women with mild to moderate endometriosis are about four to six times less likely to have a successful pregnancy.

Endometriosis often goes unnoticed for many years. Such patients are frequently, erroneously labeled as having “unexplained infertility”, until the diagnosis is finally clinched through direct visualization of the lesions at the time of laparoscopy or laparoscopy. Not surprisingly, many patients with so called “unexplained” infertility, if followed for a number of years, will ultimately reveal endometriosis.

Women who have endometriosis are much more likely to be infertile. There are several reasons for this:

  • First-Ovulation Dysfunction: In about 25 – 30% of cases, endometriosis is associated with ovulation dysfunction. Treatment requires controlled ovarian stimulation (COS). The problem is that the toxic pelvic environment markedly reduces the likelihood that anything other than IVF will enhance pregnancy potential.
  • Second- Toxic Pelvic environment that compromises Fertilization Endometriosis is associated with the presence of toxins in peritoneal secretions while it is tempting to assert that normally ovulating women with mild to moderate endometriosis would have no difficulty in conceiving if their anatomical disease is addressed surgically or that endometriosis-related infertility is confined to cases with more severe anatomical disease…nothing could be further from the truth. The natural conception rate for healthy ovulating women in their early 30’s (who are free of endometriosis) is about 15% per month of trying and 70% per year of actively attempting to conceive. Conversely, the conception rate for women of a comparable age who have mild or moderate pelvic endometriosis (absent or limited anatomical disease) is about 5-6% per month and 40% after 3 years of trying. As sperm and egg(s) travel towards the fallopian tubes they are exposed to these toxins which compromise the fertilization process. In fact it has been estimated that there is a 5-6 fold reduction in fertilization potential because of these toxins which cannot be eradicated. Frankly, it really does not matter whether an attempt is made to remove endometriosis deposits surgically as this will not improve pregnancy potential. The reason is that for every deposit observed, there are numerous others that are in the process of developing and are not visible to the naked eye and whether visible or not, such translucent deposits still produce toxins. This also explains why surgery to remove visible endometriosis deposits, controlled ovarian stimulation with or without intrauterine insemination will usually not improve pregnancy potential. Only IVF, through removing eggs before they are exposed to the toxic pelvic environment, fertilizing them in-vitro and then transferring the embryos to the uterus represents the only way to enhance pregnancy potential.
  • Third-Pelvic adhesions and Scarring: In its most severe form, endometriosis is associated with scarring and adhesions in the pelvis, resulting in damage to, obstruction or fixation of the fallopian tubes to surrounding structures, thereby preventing the union of sperm and eggs.
  • Fourth-Ovarian Endometriomas, Advanced endometriosis is often associated with ovarian cysts (endometriomas/chocolate cysts) that are filled with altered blood and can be large and multiple. When these are sizable (>1cm) they can activate surrounding ovarian connective tissue causing production of excessive male hormones (androgens) such as testosterone and androstenedione. Excessive ovarian androgens can compromise egg development in the affected ovary (ies) resulting in an increased likelihood of numerical chromosomal abnormalities (aneuploidy) and reduced egg/embryo competency”. In my opinion large ovarian endometriomas need to be removed surgically or rough sclerotherapy before embarking on IVF.
  • Fifth- Immunologic Implantation Dysfunction (IID). Endometriosis, regardless of its severity is associated with immunologic implantation dysfunction linked to activation of uterine natural killer cells (NKa) and cytotoxic uterine lymphocytes (CTL) in about 30 of cases. This is diagnosed by testing the woman’s blood for NKa using the K-562 target cell test or by endometrial biopsy for cytokine analysis, and, for CTL by doing a blood immunophenotype. These NKa attack the invading trophoblast cells (developing “root system” of the embryo/early conceptus) as soon as it tries to gain attachment to the uterine wall. In most cases, this results in death of the embryo even before the pregnancy is diagnosed and sometimes, in a chemical pregnancy or even an early miscarriage. . As such, many women with endometriosis, rather than being infertile, in the strict sense of the word, often actually experience repeated undetected “mini-miscarriages.

…there shall be no barren in the land IJN

For more information or second opinion on this topic or  your fertility concerns visit or call us to book for appointment  at Southend Fertility Clinic

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