Male, Cell-Differentiation, tr, Embryo: cy, Mice, Inbred Strains, Dysgerminoma, Genitalia, Male, Testicular-Neoplasms: ci, Transplantation-Homologous, Mice, Pregnancy, Animals, Neoplasms-Experimental: ci, Antigens, Genitalia-Male: em, Teratoma: ci, Dysgerminoma: pa, Cell Differentiation, Neoplasms, Experimental, Embryo Transfer, Embryo, Mammalian, Rats, Microscopy-Electron, Neoplasm-Transplantation, Disease Models, Animal, Microscopy, Electron, Germ Cells, Metals, Germ-Cells, Mice-Inbred-Strains, Salts, Female, Disease-Models-Animal, Copper, Neoplasm Transplantation, pa