Occupational ExposureMetallurgyAir Pollutants, OccupationalOccupational DiseasesInhalation ExposureIndustryWeldingPrenatal Exposure Delayed EffectsConstruction MaterialsEnvironmental ExposureMaternal ExposureEnvironmental MonitoringDustVehicle EmissionsChemical IndustryBody BurdenMiningOzoneTime FactorsPregnancyOccupationsWater Pollutants, ChemicalSolventsAdministration, InhalationEnvironmental PollutantsCohort StudiesRats, Inbred F344LungDose-Response Relationship, DrugSmokingCarcinogensOrgan SizeRisk AssessmentCross-Sectional StudiesRisk FactorsInfant, NewbornPrevalenceAnalysis of VarianceCase-Control StudiesIncidenceBody WeightOdds Ratio