It is now well documented that ovarian cystectomy is deleterious with regards to the ovarian reserve, and more so in endometriomas than in any other type of benign cysts. The ovarian reserve is the functional potential of the ovaries, reflecting the quantity and quality of remaining follicles. Studies have also relied greatly on the measure of serum anti-mullerian hormone (AMH) to evaluate the effect of cystectomy on ovarian reserve, as AMH is currently the most reliable marker to assess ovarian reserve. A significant difference was found between AMH before and following cystectomy in several studies. The deleterious effect of deep endometriosis surgery which comprises a wide dissection and adhesiolysis of the pelvis in many cases, even when no cystectomy has been performed, is therefore not entirely ruled out. To the best of our knowledge, there are no studies on the effect of deep endometriosis surgery, apart from ovarian surgery, on ovarian reserve.