PubertyPuberty, PrecociousPuberty, DelayedSexual MaturationAge Determination by SkeletonGonadotropin-Releasing HormoneLuteinizing HormoneBody HeightKisspeptinsBody WeightTestosteroneReproductionGrowth DisordersAge FactorsAdolescent DevelopmentTestisEstrusFollicle Stimulating HormoneGrowthSex CharacteristicsAdrenarcheOvaryHypogonadismEstradiolTurner SyndromePregnancySex FactorsAgingGonadotropinsTime FactorsOvulationSexual DevelopmentLongitudinal StudiesFertilityHypothalamic DiseasesCattleGrowth HormoneWeaningBone DevelopmentBody Mass IndexBody CompositionGonadal Steroid HormonesProgesteroneSeasonsFibrous Dysplasia, PolyostoticChild DevelopmentNeurosecretory SystemsHypothalamusDrug ImplantsAnthropometryOrgan SizeGonadal HormonesAdolescent BehaviorNeurokinin BWeight GainGonadotropins, PituitaryTriptorelin PamoatePituitary GlandUterusHypothalamo-Hypophyseal SystemEstrus DetectionHymenMenarcheAnalysis of VarianceScrotumCross-Sectional StudiesAdolescent PsychologyInsulin-Like Growth Factor IReference ValuesOxandroloneOvariectomyLeptinSwineEstrous CycleHyperandrogenismBreedingInfant, NewbornBody ImageSexual Behavior, AnimalObesityInhibinsDietOrchiectomyRandom AllocationAndrogensVirilismMammary Glands, AnimalSheepHormonesAbsorptiometry, PhotonGonadsAdrenal Hyperplasia, CongenitalFollow-Up StudiesGenitalia, MaleAdoptionAnimals, NewbornSchoolsLitter SizeEating DisordersProgesterone Congeners