More recently, in a cohort of 155 men with azoospermia, Benderradji et al. (2021) demonstrated that AMH can be used as a marker for spermatogenesis in this sub-set of patients with azoospermia; however, the cohort of patients included men with azoospermia (both obstructive and non-obstructive) as well as factors associated with male infertility itself (e.g. cryptorchidism, genetic and karyotype alterations, such as Klinefelter syndrome), which could have biased their analyses. This evidence concerns the gene AMH and cryptorchidism.