HypophysectomyPituitary GlandHypophysectomy, ChemicalGrowth HormoneAdrenocortical HyperfunctionProlactinAdrenal GlandsPituitary HormonesAdrenocorticotropic HormoneAdrenalectomyPituitary-Adrenal Function TestsRats, Inbred StrainsPergolidePituitary IrradiationCastrationAdenoma, ChromophobePituitary DiseasesThyroxinePituitary Hormones, AnteriorCosyntropinCorticosteroneOrgan SizeSphenoid BoneLiverGonadotropins, PituitaryTestosteroneDiabetes Insipidus, NeurogenicVasopressinsProgesteroneThyrotropin-Releasing HormoneLuteinizing HormoneTestisEndocrine GlandsThyroidectomyCorpus LuteumSheepSupraoptic NucleusOrchiectomy