The aim of this study was to assess the effect of ovarian suspension to the round ipsilateral ligament with a resorbable suture, performed during laparoscopic surgery for endometrioma, on postoperative ovarian adhesion formation. The tool used to assess this effect was not conventional laparoscopy but outpatient transvaginal hydrolaparoscopy. Fifty women with single ovarian endometrioma were divided in two groups (group A, 24 and group B, 26). All patients underwent laparoscopic ovarian cystectomy for endometriosis. In group A, the ovary was suspended to the ipsilateral round ligament. In group B, ovarian suspension was not performed. All patients underwent transvaginal outpatient hydrolaparoscopy as follow-up. A significantly lower rate of postsurgical ovarian adhesion in group A in comparison with group B (33.3 vs 80.8 %-p=0.001) was observed. Operative time and postoperative pain were similar in both groups. Ovarian suspension to the ipsilateral round ligament with a resorbable suture during surgery for endometrioma is associated with a lower rate of postoperative ovarian adhesion formation.