TNFSF11 and male infertility: More importantly, infertile men with low serum AMH had a lower increase in sperm production following treatment with RANKL inhibitor compared with infertile men having higher serum AMH levels that had a huge increase in sperm production, indicating a potential use of serum AMH to distinguish poor from good responders and potentially be used to select suitable candidates for the stimulatory treatment of male infertility [28, 29].