TABLE 4.

Plasma concentrations (in μmol/L) of total cysteine, homocysteine, glutathione, and cysteinylglycine during fasting¹

	Nonpregnant	First trimester	Second trimester	Third trimester	P2
Total cysteine	318.34 ± 15.42	285.16 ± 44.623	243.93 ± 27.4934	248.96 ± 34.6734	<0.001
Homocysteine	6.00 ± 1.29	5.10 ± 1.56	4.52 ± 1.66	4.23 ± 1.173	0.040
Total glutathione	3.98 ± 1.24	2.96 ± 0.85	3.34 ± 0.67	3.67 ± 1.09	NS
Cysteinylglycine	1020.6 ± 120.38	840.63 ± 63.773	800.92 ± 145.143	1022 ± 466.95	0.016

¹All values are means ± SDs.

²Obtained by using Kruskal-Wallis one-factor ANOVA.

³P < 0.05 compared with nonpregnant subjects (Mann-Whitney U test).

⁴P < 0.05 compared with first trimester subjects (Mann-Whitney U test).