Pollutant | 1st trimester | 2nd trimester | 3rd trimester | Pregnancy average | ||||
---|---|---|---|---|---|---|---|---|
Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
NO2(ppb) | 16.2 | 5.9 | 17.4 | 5.2 | 17.4 | 5.7 | 17.0 | 2.7 |
O3(ppb) | 27.3 | 6.2 | 25.7 | 5.9 | 25.4 | 6.8 | 26.1 | 2.7 |
PM2.5(μg/m3) | 12.3 | 2.0 | 12.4 | 2.0 | 12.1 | 2.7 | 12.2 | 1.1 |
PM10(μg/m3) | 31.2 | 5.1 | 31.0 | 5.9 | 30.0 | 6.1 | 30.8 | 3.7 |