Table 1: Characteristics of the signal components in direct and indirect fetal recordings.

RCD DREC IREC ρ
DFECG
ampl
(mV)		 DN ampl
(mV)		 DSNR (dB) ch IFECG
ampl
(mV)		 IN
ampl
(mV)		 ISNR1
(dB)		 ISNR2
(dB)
1 104 34 4.9 1 18 14 1.0 11.2 0.85*
2 23 30 -1.2 9.6 0.79*
3 21 15 1.5 11.1 0.87*
4 35 34 0.1 11.0 0.89*
2 87 41 3.3 1 5 72 -11.7 4.8 0.63*
2 20 106 -7.3 9.6 0.82*
3 13 94 -8.7 7.9 0.81*
4 20 114 -7.5 9.1 0.75*
3 89 73 0.9 1 5 70 -11.1 6.0 0.45*
2 18 77 -6.4 8.0 0.77*
3 11 76 -8.4 7.9 0.75*
4 22 83 -5.8 9.6 0.80*
4 208 70 4.8 1 24 56 -3.8 9.9 0.83*
2 29 55 -2.8 10.0 0.76*
3 25 31 -0.9 10.4 0.83*
4 43 43 0 10.8 0.87*
5 140 94 1.8 1 54 26 3.2 11.7 0.77*
2 41 24 2.3 10.9 0.76*
3 10 16 -1.8 7.6 0.28*
4 28 19 1.5 9.5 0.59*

*: P<10-208