Endometriosis · Fertility and Outcomes

The Prevalence of Endometriosis in Patients with Unexplained Infertility

Nezhat C, Khoyloo F, Tsuei A, Armani E, Page B, Rduch T

Published January 13, 2024 Journal of Clinical Medicine, 13(2), 444
DOI 10.3390/jcm13020444 PMID 38256580 PMC PMC11326441

RRM Academy Synopsis

Endometriosis in 90.7% of referred unexplained-infertility patients

Surgery found endometriosis in 90.7% of 215 referred patients with unexplained infertility. Doctors reviewed the charts of patients aged 25 to 45. All had been sent for surgery after treatment failed. Abnormal tissue showed up in 98.6% of them.

About 9 in 10 referred patients with unexplained infertility had pathology-confirmed endometriosis
About 9 in 10 referred patients with unexplained infertility had pathology-confirmed endometriosis. Source: Nezhat C et al., 2024, PMID 38256580.
Study at a glance, retrospective chart review: Endometriosis found in 90.7% of referred unexplained infertility patients
Study at a glance, retrospective chart review of 215 patients: Endometriosis found in 90.7% of referred unexplained infertility patients. Source: Nezhat C et al., 2024, PMID 38256580.

Key Findings

  • Pathology confirmed endometriosis, defined as endometrial-like glands and stroma, in 90.7% (n = 195) of the 215 patients.
  • Tissue abnormalities appeared in 98.6% (n = 212) of patients. Of the 17 with abnormal tissue but without endometriosis, 4 had hemosiderin-laden macrophages and 13 had fibrous tissue.
  • Before surgery, 83.7% (n = 180) had gone through one or more IUI and/or IVF cycles, and 61.9% (n = 133) had used hormonal suppression for possible endometriosis.
  • No major surgical complications occurred. Eleven patients had minor complications, and all 11 fully recovered.
  • The authors cite earlier reports of endometriosis in 30–63.2% of patients with unexplained infertility.

Interpretation

This retrospective chart review covered 215 patients referred for surgery between September 2019 and March 2023, after unsuccessful infertility treatment. Patients needed regular cycles, normal HSG results (a dye X-ray of the tubes), and a normal semen analysis or donor sperm to be included. Endometriosis showed up in the large majority of this referred group. The authors note selection bias as a factor, since the group was drawn from patients already referred for surgery. The findings support larger studies of endometriosis in women with unexplained infertility.

RRM Context

Unexplained infertility means the standard tests came back normal. The cause is still undiagnosed. The authors cite a 2016 Cochrane review: no imaging test is accurate enough to replace surgery for finding endometriosis in the pelvis. Restorative reproductive medicine looks for the cause in both partners before treatment begins. A diagnosable disease turned up in most of this referred group.

Abstract

Endometriosis, a systemic ailment, profoundly affects various aspects of life, often eluding detection for over a decade. This leads to enduring issues such as chronic pain, infertility, emotional strain, and potential organ dysfunction. The prolonged absence of diagnosis can contribute to unexplained obstetric challenges and fertility issues, necessitating costly and emotionally taxing treatments. While biopsy remains the gold standard for diagnosis, emerging noninvasive screening methods are gaining prominence. These tests can indicate endometriosis in cases of unexplained infertility, offering valuable insights to patients and physicians managing both obstetric and non-obstetric conditions. In a retrospective cross-sectional study involving 215 patients aged 25 to 45 with unexplained infertility, diagnostic laparoscopy was performed after unsuccessful reproductive technology attempts. Pathology results revealed tissue abnormalities in 98.6% of patients, with 90.7% showing endometriosis, confirmed by the presence of endometrial-like glands and stroma. The study underscores the potential role of endometriosis in unexplained infertility cases. Although the study acknowledges selection bias, a higher than previously reported prevalence suggests evaluating endometriosis in patients who have not responded to previous reproductive interventions may be justified. Early detection holds significance due to associations with ovarian cancer, prolonged fertility drug use, pregnancy complications, and elevated post-delivery stroke risk.

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Endometriosis › Fertility and Outcomes › Conception After Excision · General Gynecology › Screening and Prevention › Cervical Cancer Screening · Diagnostics › Endometrial Assessment › Luteal Phase Biopsy
Barbara Page, Camran Nezhat, Ellie Armani, Farrah Khoyloo, Thomas Rduch, Angie Tsuei
Barb Page, B Page, C Nezhat, E Armani, F Khoyloo, Tom Rduch, T Rduch, A Tsuei
PMID 38256580 38256580 DOI 10.3390/jcm13020444 10.3390/jcm13020444 Nezhat et al. 2024, Nezhat 2024