TeratogensVeratrumAbnormalities, Drug-InducedAir PollutionMorning SicknessDatura stramoniumSenecioDichloroethylenesAir PollutantsWater PollutionEnvironmental PollutionParticulate MatterPregnancyNitrogen DioxideSulfur DioxideAir Pollution, IndoorEmbryo, MammalianVehicle EmissionsEnvironmental MonitoringEnvironmental ExposureOzoneRespiratory Tract DiseasesEpidemiological Monitoring