This paper focused on the fetal wellbeing assessment, through the selection of HRV descriptors as evident markers of fetal distress. The study of behavior in experiments with control groups of healthy pregnant women and pregnant women with fetal growth restriction allows obtaining quantitative descriptors that help assess the loss of fetal well-being. The results show that SI (Sp=1, Se=0.9882), and AMo (Sp=0.8118, Se=0.9882) are evident markers of fetal distress.
