with severe endometriosis is associated with significantly lower pregnancy rates when compared with women without endometriomas (5). The negative impact of surgical excision of an endometrioma on ovarian reserve and on anti-Müllerian hormone (AMH) levels has been demonstrated (6). Despite the fact that surgery for deep infiltrating endometriosis (DIE) may increase spontaneous conception (7), recent guidelines do not recommend surgery with the single aim of improving assisted reproductive technology (ART) outcomes (6). Several studies have taken into consideration how endometriosis affects pregnancy achievement and pregnancy development, including obstetric complications (8). Pregnancy complications accompanying preexisting endometriosis may be explained by some pathogenic mechanisms, such as endometriosis-related chronic inflammation (9), the presence of adhesions and their mechanical implications (10), and the invasion of decidualized ectopic endometrium in to the vessels wall (11, 12). The aim of this review is to analyze the current literature regarding the relationship between different forms of endometriosis (endometrioma, peritoneal endometriosis, DIE) and infertility, and the impact of endometriosis on pregnancy outcomes. Does endometrioma mean infertility? Endometrioma is a frequently encountered entity in ovarian surgery and affects from 17% to 44% of patients with endometriosis (13). The most common symptoms of ovarian endometriomas include dysmenorrhea, chronic pelvic pain, dyspareunia, and infertility. Transvaginal ultrasound (TVU) has a high diagnostic accuracy for the diagnosis of endometrioma