Frequency and Time Domain Analysis of Foetal Heart Rate Variability with Traditional Indexes: A Critical Survey

<div>FHRV power spectrum. Mean power spectrum of FHRV computed using detrend (a) and mean power spectrum of FHRV computed after floating line subtraction (b). In the oval (a), the part of VLF band modified by a residual of VLF band.</div>

Computational and Mathematical Methods in Medicine

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Figure 3

Figure 3: Frequency and Time Domain Analysis of Foetal Heart Rate Variability with Traditional Indexes: A Critical Survey 