AMH and Infertility: This preliminary step revealed variables such as age, duration of infertility, gravidity, parity, current career status, main indication for ART, basal follicle stimulating hormone (FSH), E2, testosterone (T), anti-Müllerian hormone (AMH), antral follicle count (AFC), endometrial thickness on hCG day, endometrial type, number of embryos transferred and good-quality embryos transferred as potential confounders (Table 3).