Figure 4From: Reproducibility and repeatability of measuring the electrical impedance of the pregnant human cervix-the effect of probe size and applied pressureRepeatability and reproducibility standard deviations for cervical resistivity by probe and force of application. Repeatability (one observer) and reproducibility (two observers) standard deviations for cervical resistivity derived by both the 3 mm and 12 mm probes applied to the cervix softly (0.8 Newton) and firmly (2.2 Newton).Back to article page