Cxcl1/CXCL1 in fetal membranes and placenta. Relative mRNA expression and concentration of Cxcl1/CXCL1 in fetal membranes (A and C) and placenta (B and D). Data are presented as mean ± SEM of determinations in duplicate per group of tissues (n=5 each). Means with different letters are significantly different. P values: B) a vs. b p<0.028; C) a vs. b p<0.044, b vs. c p=0.009, a vs. c p=0.02.