Right hand Left hand p value Power   Non-pregnant women (n=47)  TPp (au2) 20150 (17480~23220) 23180 (19420~25340) 0.046 0.999 nP1 65.9 (60.8~71.6) 65.1 (58.7~72.3) 0.152 0.568 nP2 9.6 (9.0~12.1) 9.5 (8.3~11.8) 0.515 0.508 nP3 3.1 (2.0~4.0) 2.5 (2.0~3.5) 0.059 0.818 nP4 0.59 (0.35~0.82) 0.46 (0.30~0.68)* <0.001 0.952 nP5 0.33 (0.21~0.42) 0.24 (0.19~0.33)* <0.001 0.999 nP6 0.09 (0.06~0.18) 0.08 (0.05~0.13) 0.008 0.955 nP7 0.02 (0.01~0.04) 0.02 (0.01~0.03) 0.109 0.781 nP8 0.008 (0.005~0.013) 0.007 (0.006~0.011) 0.593 0.491 Late pregnant women (n=23)  TPp (au2) 19140 (14850~20580) 20640 (16440~23810) 0.37 0.943 nP1 65.0 (57.6~72.9) 63.2 (57.6~70.7) 0.403 0.43 nP2 17.2 (13.6~23.9) 19.5 (11.1~21.2) 0.796 0.314 nP3 2.6 (2.1~3.1) 2.3 (1.8~2.9) 0.039 0.94 nP4 0.70 (0.52~0.79) 0.61 (0.40~0.73) 0.034 0.998 nP5 0.17 (0.11~0.28) 0.16 (0.12~0.22) 0.212 0.812 nP6 0.02 (0.02~0.06) 0.03 (0.02~0.05) 0.241 0.772 nP7 0.01 (0.01~0.02) 0.01 (0.01~0.01) 0.025 0.896 nP8 0.004 (0.002~0.010) 0.003 (0.002~0.010) 0.194 0.963

Table 2: Comparisons of the total power of pulse and the normalized pulse harmonics in the power spectra between right and left pulses in the non-pregnant and late pregnant women. *p<0.0056 vs right pulse, au: Arbitrary unit