Three hundred and two novel mouse genes with human orthologs without a reported mouse model. The listed genes were identified in one or more mouse datasets as indicated in the Venn diagram. Underlined genes were also identified through our studies as reproductive tract-specific in human (111 genes). Genes written in blue encode either enzymes, kinases, GPCRs, oGPCRs, transporters, transcription factors, or proteins involved in epigenetic regulation (60 genes). Genes written in dark red were identified in both testis (testis and/or testis cell) and epididymis (14 genes).