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This study was approved by the Research Ethics Committee of the hospital on 12 October 2012. All infertile women who met the eligibility criteria and agreed to participate in the study provided written informed consent.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics Approval and Consent to Participate"}},{"value":"This retrospective study was referred to as clinical data analysis. In total, 5629 women were included for analysis, 635 women with a diagnosis of EMs via laparoscopic surgery, and 4634 women with male factor infertility as control. The above eligible patients who consented to participate were analyzed from January 2013 to October 2017. In addition, we also collected the CCs from 19 women in the EMs group and 24 women in the control group who underwent IVF to test the cumulus expansion\u2013related genes in June 2019.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Study Size"}},{"value":"No applicable.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for Publication"}},{"value":"The authors declare that they have no competing interests.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing Interests"}}]}}