TestisSpermatogenesisSertoli CellsLeydig CellsSpermatozoaSpermatidsSpermatogoniaTesticular NeoplasmsSpermatocytesTesticular DiseasesSeminomaRete TestisInfertility, MaleCryptorchidismSeminiferous TubulesMolecular Sequence DataSeminiferous EpitheliumTestosteroneBase SequenceVaricoceleRNA, MessengerAmino Acid SequenceAzoospermiaTissue DistributionDNA, ComplementaryImmunohistochemistryReverse Transcriptase Polymerase Chain ReactionGerm CellsSertoli Cell-Only SyndromeIn Situ HybridizationCloning, MolecularOrgan SpecificityEjaculationVasectomyBlotting, NorthernAlternative SplicingCarcinoma, EmbryonalNeoplasms, Germ Cell and EmbryonalMesonephromaSemenProtamines17-Hydroxysteroid DehydrogenasesGene ExpressionFetusSequence Homology, Amino AcidBlotting, WesternAcrosomeMeiosisGene LibraryOligospermiaEpididymis