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Endometriosis: symptoms, causes, and treatment

Doctora realizando ecografía para detectar la endometriosis

What is endometriosis?

Endometriosis is a common chronic benign disease. It develops when endometrial-like tissue - the inner lining of the uterus - grows outside the uterus, commonly on the ovaries. It can also develop in the bladder, in the abdominal cavity or in the lung or gums. 

According to gynaecological experts, it affects approximately 15% of women of childbearing age.

Symptoms

Symptoms of endometriosis

Endometriosis generally manifests in the following way:


Although the most common symptom is menstrual pain, usually during menstruation, this is not always the case. The symptoms are sometimes confusing or even do not manifest themselves at all, as in the case of asymptomatic women.  

The severity of endometriosis will depend on the existence and extent of the lesions, which will ultimately define the different degrees of the disease: I, II, III and IV.

CAUSES

Causes and consequences of endometriosis

One of the main problems with endometriosis is that the causes are unknown. Both the lesions that occur and the symptomatology of patients suffering from endometriosis are treatable and may even disappear. Even so, it is impossible to determine the origin of the disease, which will possibly lead to the lesion forming again, even repeatedly.

Retrograde menstruation

Fundamental to explain pathologies in the context of uterine malformations. According to this theory, fragments of endometrium from the menstrual period would ascend the tubes and reach the peritoneum and ovaries. These fragments would become implanted in these tissues, generating endometriosis.

Coelomic metaplasia

issues from the peritoneal area are transformed into endometrial tissue in places where they do not belong.

Immunological causes

Failures in the immune system. They are responsible for small endometrial foci appearing in different tissues being tolerated and generating clinical or subclinical endometriosis.

Retrograde menstruation

Fundamental to explain pathologies in the context of uterine malformations. According to this theory, fragments of endometrium from the menstrual period would ascend the tubes and reach the peritoneum and ovaries. These fragments would become implanted in these tissues, generating endometriosis.

Coelomic metaplasia

issues from the peritoneal area are transformed into endometrial tissue in places where they do not belong.

Immunological causes

Failures in the immune system. They are responsible for small endometrial foci appearing in different tissues being tolerated and generating clinical or subclinical endometriosis.

Fertility

How does endometriosis affect fertility?

Between 30%-50% of cases of endometriosis cause infertility, i.e. the ‘conventional’ search for pregnancy is complicated. The disease can affect fertility in various ways:

Endometriosis can cause scarring of the fallopian tubes or ovaries.

This inflammatory disease can cause toxicity to sperm and eggs.

It can also cause endometrial alterations that affect embryo implantation.

It may also lead to endocrine disorders that decrease the quality of ovulation.

Can you have children with endometriosis?

Many women who suffer from this disease wonder whether they will be able to get pregnant with endometriosis. The answer is yes: many women with endometriosis can become pregnant and have children, even naturally.

However, the disease can affect fertility in some cases, especially when there is pelvic inflammation, ovarian involvement, or alterations in the fallopian tubes. The possibility of having children with endometriosis depends on several factors, including:


Not all patients with endometriosis experience infertility. In fact, many women achieve a natural pregnancy without the need for assisted reproductive treatments. In moderate or severe cases, it may be more difficult to achieve pregnancy.

Endometriosis and pregnancy

Pregnancy improves the symptoms of endometriosis because there is no menstrual cycle during pregnancy. The secretion of the hormones that regulate ovulation is stopped. In this sense, the ovaries do not produce oestrogens and the hormones that promote the growth and development of endometrial plaques remain at rest.

Finally, if we talk about the mark that endometriosis leaves on fertility, we must consider that, as it is an inflammatory, progressive and chronic condition, the best decision for a patient of childbearing age is to preserve her fertility. Endometriosis can affect ovarian reserve, oocyte quality or endometrial receptivity, among other things. This means that freezing eggs when fertility is not fully affected is a good way of fulfilling a future desire to have children.

Egg vitrification makes it possible to achieve gestation at a later date, even if the endometriosis has progressed and affected the ovarian reserve. The patient will be able to keep her fertile eggs from the moment she is diagnosed with mild or moderate endometriosis.

Congelación de óvulos para preservar la fertilidad Dr. Manuel Izquierdo con paciente de endometriosis en IVF-Life Madrid

Testimony of a patient with endometriosis and pregnancy in IVF-Life

Laura, an IVF-Life patient, tells us how she managed to become a mother with endometriosis thanks to assisted reproduction.

Types of endometriosis

We can differentiate between different degrees of endometriosis: minimal, mild, moderate and severe. In Assisted Reproduction they are known respectively as stages I, II, III and IV. 

In stage I or minimal, there are isolated and superficial implants, while in more advanced stages there may be adhesions, deeper lesions or what specialists call ‘chocolate cysts’ or endometriomas.   

Detection

How is endometriosis detected?

The detection of endometriosis is not simple. That is why IVF-Life must warn of the importance of carrying out a prior study of female fertility if you wish to become a mother.

In general, the definitive diagnosis is confirmed with a vaginal ultrasound and in cases of severe endometriosis by laparoscopy. This is a minimally invasive test that can detect cysts (also called endometriomas or chocolate cysts) or the presence of pelvic adhesions.

There is also a blood test for Ca 125 protein levels. This is a tumour marker that can be high in certain cancers, and in other diseases such as endometriosis I and II. However, it is not considered relevant for detecting endometriosis, as the values can be altered by the presence of fibroids, ovarian cancer or menstruation.

Paciente de IVF-Life con endometriosis

Endometriosis treatment

There is currently no cure for endometriosis, but there are treatments that can alleviate its consequences. Painkillers can relieve pain, as can hormone treatments, which in certain cases can also slow the progression of the disease. Surgery is an option for women who are in severe pain, always bearing in mind that removing a cyst does not mean that another one will not appear.

Professionals initially opt for less invasive medical treatments than surgery. Depending on the degree of endometriosis that the woman suffers from and her idea of becoming pregnant, the following can be carried out: 

  • Treatment with painkillers.
  • Contraceptives.
  • Both hormonal and non-hormonal therapies.


All treatments can improve the symptomatology of many patients. This requires monitoring the evolution of the disease and being able to make decisions after analysing the response to treatment. Surgery is aimed at women who do not respond to initial treatment or women with other organ involvement.

It is possible that the fertility specialist may recommend a laparoscopy before starting treatment to improve the probability of pregnancy with endometriosis.

Treatment

Fertility treatments for women with endometriosis

Depending on the degree of the disease, assisted reproduction techniques may be the solution to achieve pregnancy. 

One of the most successful fertility treatments for patients with endometriosis is in vitro fertilisation (IVF), either conventional IVF or ICSI. It is also a good option when artificial insemination has not been successful. 

However, we must explain that surgery can damage healthy tissue during the intervention and cause further deterioration of fertility. However, in these cases, treatment with egg donation can be used. 

In vitro fertilisation (IVF)

This treatment is performed with oocytes extracted and fertilized in the laboratory (in vitro) with the semen of the couple or an anonymous donor.

Egg donation

Fertility treatment that consists of performing In Vitro Fertilization with the oocytes of an anonymous donor.

ISCI

IVF with ICSI is a technique that combines conventional in vitro fertilization with the direct injection of a sperm into the egg.

In vitro fertilisation (IVF)

This treatment is performed with oocytes extracted and fertilized in the laboratory (in vitro) with the semen of the couple or an anonymous donor.

Egg donation

Fertility treatment that consists of performing In Vitro Fertilization with the oocytes of an anonymous donor.

ISCI

IVF with ICSI is a technique that combines conventional in vitro fertilization with the direct injection of a sperm into the egg.

Find answers to your questions

Frequently Asked Questions about Endometriosis

Does endometriosis cause weight gain?

Endometriosis does not directly cause weight gain. However, some people may notice changes in their weight due to associated factors such as chronic inflammation, fluid retention, pain that limits physical activity, or certain hormonal treatments. Each body responds differently, so not everyone with endometriosis experiences these changes.

Which foods are recommended to avoid if I have endometriosis?

There is no single diet, but many specialists recommend reducing foods that promote inflammation, such as:

  • Ultra-processed foods and fast food.
  • Refined sugars.
  • Trans fats and fried foods.
  • Alcohol.
  • Excessive consumption of red meat.


In general, it is advisable to prioritize an anti-inflammatory diet rich in fruits, vegetables, fish, legumes, and healthy fats, always tailored to each individual and, if possible, with professional guidance.

Is it related to cancer?

Endometriosis is not cancer. In the vast majority of cases, it is a benign condition, and most people with endometriosis never develop cancer. 

Is it dangerous?

Endometriosis is not usually a life-threatening disease, but it can be serious and significantly affect quality of life. It may cause chronic pain, digestive disturbances, fatigue, and even difficulties in achieving pregnancy. Therefore, early diagnosis and appropriate medical follow-up are important to control symptoms and prevent complications.

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