Health Book Citation

Normal fetal heart rate exhibits fluctuations of approximately 6 to 25 beats minute see fig. Your baby s heart continues to develop during pregnancy.

Fetal Heart Rate Chart Fetal Heart Rate Fetal Heart Rate Chart Baby Heart Rate

At this point it begins a rapid deceleration to the normal fetal heart rate for mid pregnancy to about 120 180 bpm.

Normal heart rate of a fetus. By the beginning of the ninth week of pregnancy the normal fetal heart rate is an average of 175 bpm. Normal fetal heart rate. The fetal heart rate is between 90 and 110bpm in early pregnancy 7.

Unusually low or high fhr is one of the main fetal distress symptoms. A fetal heart rate range of 100 160 is considered as normal. Following this the heartbeat becomes normal and stabilizes between 120 and 160bpm during the second and third trimesters.

Begins at 80 bpm ends at 103 bpm. A normal fetal heart rate fhr usually ranges from 120 to 160 beats per minute bpm in the in utero period. If the baby s heartbeat is not audible for a week or more miscarriage is likely to happen.

Current international guidelines recommend for the normal fetal heart rate fhr baseline different ranges of 110 to 150 beats per minute bpm or 110 to 160 bpm. If the heartbeat of the fetus is normal chances of miscarriage are very low. It is measurable sonographically from around 6 weeks and the normal range varies during gestation increasing to around 170 bpm at 10 weeks and decreasing from then to around 130 bpm at term.

It will then rise and peak around the 9th and 10th week to 170 bpm. 216 235 236 this beat to beat variability reflects the modulation of heart rate by autonomic particularly parasympathetic input and especially depends on inputs from cerebral cortex diencephalon and upper brain stem to the cardiac centers. We started with a precise definition of normality and performed a retrospective computerized analysis of electronically recorded fhr tracings.

The normal heart rate of a fetus from when it begins to beat around 5 weeks to the end of the first trimester will increase then decrease steadily over this period as mapped out in the table below.

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