Endometrial HyperplasiaEndometriumEndometrial NeoplasmsHyperplasiaProgestinsUterine DiseasesPolypsUterine HemorrhageLevonorgestrelEndometritisCarcinoma, EndometrioidUterine NeoplasmsIntrauterine Devices, MedicatedHysterectomyCurettageContraceptive Agents, FemaleUterusDilatation and CurettageLynestrenolMenstrual CyclePrecancerous ConditionsImmunohistochemistryAnimals, ZooAdenocarcinomaProstatic HyperplasiaHysteroscopyCarcinoma in SituEndometriosisEstradiolReceptors, ProgesteroneLeiomyomaRats, Mutant StrainsEstrogensEmbryo ImplantationBiopsyWorld Health OrganizationOvariectomyAdrenal Hyperplasia, CongenitalPTEN Phosphohydrolase