The presence of endometrial tissue outside of the endometrium and myometrium is referred to as pelvic endometriosis. Deep infiltrative endometriosis is the presence of endometrial implants, fibrosis, and muscle hyperplasia that extend more than 5 millimetres into the peritoneum (DIE). The most precise treatment for assessing tubal pathologic abnormalities and other hidden intra-abdominal causes of infertility is diagnostic laparoscopy, according to most experts. Diagnostic laparoscopy may be useful in the infertility work-up programme before moving on to intrauterine insemination (IUI) treatment since IUI requires ideal conditions for the ovum pick-up and its transport mechanism. 
Aim of the Work : The aim of this study was to evaluate the value of laparoscopy in diagnosis of endometriosis in cases of unexplained infertility.
Methods : This observational cross section study included 24 cases of unexplained infertility diagnostic laparoscopy done for all of them. 
Results: Laparoscopic findings in studied patients, 9 patients (37.5%) showed endometriosis, 8 patients (33.3%) showed adhesions and 7 patients (29.2%) showed no laparoscopic findings. endometriosis grade detected by laparoscopy in studied patients. 1 patient (11.1%) showed endometriosis grade I, 2 patients (22.2%) showed endometriosis grade II, 2 patients (22.2%) showed endometriosis grade III and 4 patients (44.4%) showed endometriosis grade IV.  
Conclusion: It is concluded that endometriosis is a common diagnosis in women with unexplained infertility and chronic pelvic pain. Laparoscopy should be indicated when diagnosis is suspected, together with tissue sampling and histopathologic examination.