extremely significantp < 0.0001
Absolute UV flow measured within the first 3 h post-cannulation was positively correlated to HR in pumped AP circuits ( r 2 = 0.44; p < 0.0001; Figure 2G ), but negatively correlated in fetuses maintained on a pumpless circuit ( r 2 = 0.45; p < 0.0001; Figure 2G ), with differences between the slopes being extremely significant ( p < 0.0001).