Respiratory organs--Diseases (2) Pregnant women (2) Pregnancy (2) Pollution (2) Gases (2) Attention (2) Air--Pollution (2) Atención (2) Mujeres embarazadas (2) Embarazo (2) Contaminación (2) Aparato respiratorio--Enfermedades (2) Atmósfera--Contaminación (2) Gases (2) grossesse (2) Minors (1) Origin (1) Women (1) Winds (1) Weights and measures (1) Tungsten (1) Tonsillitis (1) Temperature (1) Sulfur dioxide (1) Statistics (1) Respiratory organs (1) Quarries and quarrying (1) Proportion (1) Production (Economic theory) (1) Pollutants (1)