AMH and Infertility: Patients’ demographic and cycle characteristics of FETs between the immediate and delayed FET groups stratified by COS protocols are shown in Table 1.When FET cycles following the same COS protocol, there were no differences between the immediate and delayed FET groups in patients’age, body mass index (BMI), AMH, basal hormonal profile, infertility duration, types and causes of infertility, and endometrial thickness.