TEX101 and Infertility: In the last decade, only four reproductive tract-specific genes with infertile mouse models have been identified that fit the criteria of being expressed as early as the spermatogonia stage: ASZ1 (Ma et al., 2009), MOV10L1 (Frost et al., 2010; Zheng et al., 2010), SCML2 (Hasegawa et al., 2015), and TEX101 (Fujihara et al., 2013; Li et al., 2013) (Table 1).