Relative levels of SMILE mRNA in the mouse uterus during early pregnancy and pseudopregnancy. (A), delayed implantation (B) and steroid hormonal treatments (C) were assessed using real-time PCR. SMILE expression was normalised to RPLP0 and GAPDH. The values represent the mean ± S.E.M from three independent experiments. Bars with different letters are significantly different (P < 0.05).