CA-125 levels appear to fall during endometriosis treatment, but it has not shown a correlation with disease response.Another review in 2011 identified several putative biomarkers upon biopsy, including findings of small sensory nerve fibers or defectively expressed β3 integrin subunit. It has been postulated a future diagnostic tool for endometriosis will consist of a panel of several specific and sensitive biomarkers, including both substance concentrations and genetic predisposition.A 2016 review of endometrial biomarkers for diagnosing endometriosis was unable to draw conclusions due to the low quality of the evidence.MicroRNAs have the potential to be used in diagnostic and therapeutic decisions

Histopathology
For a histopathological diagnosis, at least two of the following three criteria should be present:
Endometrial type stroma
Endometrial epithelium with glands
Evidence of chronic hemorrhage, mainly hemosiderin depositsImmunohistochemistry has been found to be useful in diagnosing endometriosis as stromal cells have a peculiar surface antigen, CD10, thus allowing the pathologist go straight to a staining area and hence confirm the presence of stromal cells and sometimes glandular tissue is thus identified that was missed on routine H&E staining. Pain quantification
The most common pain scale for quantification of endometriosis-related pain is the visual analogue scale (VAS); VAS and numerical rating scale (NRS) were the best adapted pain scales for pain measurement in endometriosis. For research purposes, and for more detailed pain measurement in clinical practice, VAS or NRS for each type of typical pain related to endometriosis (dysmenorrhea, deep dyspareunia and non-menstrual chronic pelvic pain), combined with the clinical global impression (CGI) and a quality of life scale, are used.
Most complications occurred in cases of low intestinal anastomosis, while risk of fistula occurred in cases of combined abdominal or vaginal surgery, and urinary tract problems were common in intestinal surgery. The evidence was found to be insufficient regarding surgical intervention.The advantages of physical therapy techniques are decreased cost, absence of major side-effects, it does not interfere with fertility, and near-universal increase of sexual function. Disadvantages are that there are no large or long-term studies of its use for treating pain or infertility related to endometriosis. Treatment of infertility
Surgery is more effective than medicinal intervention for addressing infertility associated with endometriosis. Surgery attempts to remove endometrium-like tissue and preserve the ovaries without damaging normal tissue. Receiving hormonal suppression therapy after surgery might be positive regarding endometriosis recurrence and pregnancy. In-vitro fertilization (IVF) procedures are effective in improving fertility in many individuals with endometriosis.During fertility treatment, the ultralong pretreatment with GnRH-agonist has a higher chance of resulting in pregnancy for individuals with endometriosis, compared to the short pretreatment. Research
Preliminary research on mouse models showed that monoclonal antibodies, as well as inhibitors of MyD88 downstream signaling pathway, can reduce lesion volume. Thanks to that, clinical trials are being done on using a monoclonal antibody directed against IL-33 and using anakinra, an IL-1 receptor antagonist.Promising preclinical outcomes is pushing clinical trials into testing cannabinoid extracts, dichloroacetic acid and curcuma capsules. Epidemiology
Determining how many people have endometriosis is challenging because definitive diagnosis requires surgical visualization through laparoscopic surgery.