| Males N = 18,335 | Females N = 18,263 |
---|---|---|
Birth/placental weight | 5.37 ± 0.84 | 5.28 ± 0.82*** |
Umbilical vein PO2 | 27.9 ± 6.1 | 28.3 ± 6.1*** |
Umbilical artery PO2 | 15.9 ± 5.2 | 15.7 ± 5.1*** |
Umbilical vein O2 saturation | 62.4 ± 14.8 | 63.5 ± 14.5*** |
Umbilical artery O2 saturation | 26.8 ± 12.9 | 26.2 ± 12.4*** |
Fractional O2 extraction | 0.57 ± 0.17 | 0.58 ± 0.17*** |