The exclusioncriteria were the following: serum AMH levels obtained more than 6 monthsprior to the start of the ovarian stimulation, the presence of a singleovary, non-Caucasian ethnicity, a controlled ovarian stimulation cycleperformed for the purpose of oocyte donation or fertility preservation, adocumented diagnosis of endometriosis, a documented history of ovariansurgery and the absence of essential data for the study in the medicalrecords (absence of the number of oocytes obtained or the AMH value). Here, AMH is linked to endometriosis.