Computers were introduced for fetal rate(FHR) analysis primarity to obtain and objective and numeric analysis of the FHR, therefore resolving disagreements about the FHR tracing and its interpretation. Among each variable of FHR data, baseline
FHR
is
the most important variable for analysis of antepartum FHR tests ; nonstress test(NST) and contration test(CST). The author already has reported the relationship between baseline FHR and gestational weeks. However, there were only few reports
concerning
the effect of fetal movements on baseline FHR. We attempted to determine the relationship between the fetal movements and baseline FHR using computerized FHR analysis system at term pregnancy.
From June 1988 to May 1994, 1394 normal term pregnancies were entered to this study. The standard 20-minutes NST was performed in all patients using HYFM-1 software that was already developed for computerized analysis of FHR at Hanyang University
Hospital. With increasing numbers of fetal movements, the mean baseline FHR was increased. In this study, there were significant positive correlation between number of fetal movements. and baseline. FHR with the equation of
Y=141.862±0.142*X(where
Y=mean FHR, X-number of fetal movements ; r=0.712, p=0). We also suggest nomogram of baseline FHR according to each number of fetal movement at term pregnancy. The result of this study would be useful in the development of complete computerized
FHR
analysis system, especially in the field of automated analysis as a background databse of FHR.
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