Table 2.

Values of antioxidant substances in blood from NP and controls

	Control group	Normal pregnancy group
Superoxide dismutase (U SOD/mg protein)	38.0 ± 2.09	43.5 ± 1.47*
Catalase (units/mg of protein)	13.75 ± 1.43	17.15 ± 0.33**
Ascorbic acid (μmol/l)	4.25 ± 0.75	2.77 ± 0.25*
Total sulfhydryl content (μmol SH/ml of plasma)	0.67 ± 0.04	0.36 ± 0.02***
n	7–9	11–30

Results are expressed as the mean value ± SEM for n = 7–30. Independent experiments performed in triplicate.

Data were analyzed by unpaired t-test. *P < 0.05; **P < 0.01; ***P < 0.001.