AMH and endometriosis: Blood tests were missed for 2 patients in the DNG group at the time of enrollment, one patients’ value of AMH was lower the limit of quantification, one patient underwent emergency surgery (micro rupture of endometrioma) after 1 month of enrollment, and one patient did not meet the eligibility criteria for pathological diagnosis (postoperative pathological specimen did not match endometriosis), therefore, these 5 patients from the DNG group were excluded.