Ambystoma mexicanumRegenerationExtremitiesTurbellariaGerm CellsNotophthalmusAmbystomaNotophthalmus viridescensNeoplasms, Germ Cell and EmbryonalForelimbSalamandridaeTestisSpermatogenesisTesticular NeoplasmsPlanariansAnimal FinsGerminomaSpermatozoaTriturusSertoli CellsSeminiferous TubulesSpermatogoniaTailSpermatocytesSpermatidsGonadsSeminomaGene Expression Regulation, DevelopmentalAmputationIn Situ HybridizationCell DifferentiationMeiosisUrodelaZebrafishPleurodelesWheat Germ AgglutininsWilms TumorSeminiferous EpitheliumDysgerminomaOogenesisNerve TissueOvaryGerm LayersGametogenesisMolecular Sequence DataTeratomaEndodermal Sinus TumorOogoniaEmbryo, NonmammalianImmunohistochemistrySex DifferentiationAnimals, Genetically ModifiedNuclear Receptor Subfamily 6, Group A, Member 1Cell DedifferentiationMesodermStem CellsAnaplasiaAmino Acid SequenceZebrafish ProteinsTooth GermTretinoinRNA, MessengerBase SequenceInfertility, MaleCryptorchidismAmputation StumpsHomeodomain ProteinsMorphogenesisAnimal StructuresPentosan Sulfuric PolyesterGenes, HomeoboxWound HealingMediastinal NeoplasmsOctamer Transcription Factor-3Body PatterningOocytesRNA-Binding ProteinsGene ExpressionOvumCell ProliferationCarcinoma, EmbryonalCell LineageReverse Transcriptase Polymerase Chain ReactionRetroperitoneal NeoplasmsFibroblast Growth FactorsEpidermisXenopus ProteinsDNA, ComplementaryLarvaDermisXenopus laevisChoristomaApoptosisSignal TransductionCartilageSperm CountCaenorhabditis elegansModels, BiologicalTranscription FactorsSex Determination Processes