(H) Quantitative RT-PCR analysis of p16, p21 and DCR2 expression in IUGR-complicated and in normal placentas. Results were obtained from four human normal and four IUGR placentas. Data information: Values are means + SEM of at least three experimental repeats. Statistical significance was determined by unpaired two-tailed Student's t-test (*) p < 0.05; (**) p < 0.01; (***) p < 0.001. 