| N | Minimum | 25th percentile | Mean | Median | 75th percentile | Maximum |
---|---|---|---|---|---|---|---|
PM 10 exposure (μg/m 3 ) |  |  |  |  |  |  |  |
Prenatal | Â | Â | Â | Â | Â | Â | Â |
   First trimester | 7894 | 22.0 | 27.7 | 30.6 | 30.5 | 33.4 | 43.1 |
   Second trimester | 8311 | 21.3 | 26.2 | 30.1 | 29.5 | 33.3 | 45.6 |
   Third trimester | 8438 | 22.0 | 26.6 | 29.8 | 29.8 | 32.0 | 43.5 |
   Total pregnancy | 7877 | 23.1 | 27.7 | 30.2 | 29.9 | 32.8 | 39.9 |
Postnatal | Â | Â | Â | Â | Â | Â | Â |
   Month 0-6 | 8381 | 22.7 | 27.3 | 29.5 | 29.3 | 31.4 | 39.9 |
   Month 7-12 | 8082 | 22.8 | 27.0 | 28.8 | 28.7 | 30.5 | 39.3 |
NO 2 exposure (μg/m 3 ) |  |  |  |  |  |  |  |
Prenatal | Â | Â | Â | Â | Â | Â | Â |
   First trimester | 7893 | 21.4 | 36.9 | 40.2 | 40.6 | 43.5 | 58.5 |
   Second trimester | 8310 | 20.2 | 35.2 | 39.6 | 40.5 | 43.9 | 59.7 |
   Third trimester | 8434 | 21.3 | 35.4 | 39.3 | 39.9 | 43.2 | 58.8 |
   Total pregnancy | 7889 | 25.3 | 37.0 | 39.7 | 39.5 | 42.2 | 56.9 |
Postnatal | Â | Â | Â | Â | Â | Â | Â |
   Month 0-6 | 8389 | 24.2 | 36.3 | 39.4 | 39.5 | 42.5 | 59.3 |
   Month 7-12 | 8082 | 24.1 | 35.5 | 38.6 | 38.6 | 41.6 | 58.0 |