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Table 41-1

SubjectAgePO2 (mm Hg)PCO2 (mm Hg)pH
Fetus (term)Before labor25407.37
Fetus (term)End of labor10–20557.25
Newborn (term)10 min50487.20
Newborn (term)1 hr70357.35
Newborn (term)1 wk75357.40
Newborn (preterm, 1,500 g)1 wk60387.37