Relative mRNA abundance for endometrial inhibitors of NFKB activation. NFKBIA (Top panel; effect of day, P < 0.001) and NFKBIB (Lower panel; day × status effect, P = 0.079), in cyclic (light bars) and pregnant (dark bars) gilts. Relative abundance of mRNA was calculated from the quantitative RT-PCR analysis as described in Materials and Methods. Bars without common lowercase superscripts represent a statistical difference (P < 0.05) between day/status combinations whereas differences in uppercase superscripts represent statistical differences between days of gestation. Relative mRNA units are presented as mean ± SEM.