AMH and Infertility: Due to the retrospective nature of the study we could not consider several factors related to infertility treatment as potential confounders, including data on the IVF/ICSI treatments: basal hormonal biomarkers of ovarian reserve (FSH, AMH, AFC), type of protocol, type of gonadotropins, starting dose, total dose, number of dominant follicles, number of oocytes retrieved, number of mature oocytes, fertilization rate, number of embryos transferred, stage of embryos transferred, which may influence pregnancy rates.