According to ESHRE recommendations for women with stage I/II endometriosis, if a decision is made to proceed to laparoscopy then operative laparoscopy (excision or ablation of the endometriotic lesions) should be performed rather than only diagnostic laparoscopy, to increase ongoing pregnancy rates. Also, for infertile women with stage I/II endometriosis doctors may consider complete surgical removal of endometriosis to improve live birth rate prior to assisted reproductive treatment. This last recommendation is not well established.