Randomized controlled trial (RCT) comparing carbon dioxide to full conditioning (addition of oxygen, nitrous oxide, humidification and temperature control, dexamethasone and Hyalobarrier gel) Women undergoing laparoscopy for endometriosis, myomectomy or adhesiolysis will be randomized to either group and will be compared for pain (VAS scores); inflammation (White blood cells, CRP) and adhesions scored by second look laparoscopy.