Reproductive HistoryGravidityParityMaternal AgeMenarchePregnancyAbortion, SpontaneousPapio hamadryasReproductionMenopauseBirth OrderContraceptives, OralRisk FactorsAbortion, HabitualSterilization, TubalBirth IntervalsPaternal AgeFertilityCase-Control StudiesFetal DeathAge FactorsPregnancy OutcomeMenstrual CycleAbortion, InducedBreast NeoplasmsQuestionnairesBreast FeedingCohort StudiesInfertility, FemaleEstrogen Replacement TherapyOdds RatioPremenopauseLogistic ModelsFamily CharacteristicsDenmarkSwedenEpidemiologic MethodsConfidence IntervalsPostmenopauseRiskRisk AssessmentIncidenceInfant, NewbornSocioeconomic FactorsProspective StudiesSmokingEstrogensBirth WeightCross-Sectional StudiesMedical History TakingRetrospective StudiesHistory, 20th CenturyTime FactorsUnited StatesHistory, 19th CenturyBody Mass IndexHistory of MedicineHistory, 17th CenturyHistory, 18th CenturyHistory, AncientHistoryHistory, 21st CenturyHistory, MedievalHistory, 16th Century