Endometrial HyperplasiaEndometrial NeoplasmsHyperplasiaEndometriumProgestinsUterine DiseasesPolypsCarcinoma, EndometrioidLevonorgestrelUterine HemorrhageEndometritisHysterectomyIntrauterine Devices, MedicatedUterine NeoplasmsCurettageIncidenceContraceptive Agents, FemaleDilatation and CurettageLynestrenolPrecancerous ConditionsAnimals, ZooProstatic HyperplasiaAdenocarcinomaUterusCarcinoma in SituHysteroscopyImmunohistochemistryRats, Mutant StrainsWorld Health OrganizationAdrenal Hyperplasia, CongenitalLeiomyoma