Normal Fetal Heart Rate
May 24, 2022
Source: Cainiu Health
Dr. Chen Zhe
Introduction
Fetal heart rate is assessed via ultrasound during the first and second trimesters. In the third trimester—particularly after 32 weeks—it is monitored using electronic fetal monitoring (EFM). The normal baseline fetal heart rate typically ranges from 111 to 160 beats per minute (bpm). Transient accelerations in fetal heart rate may occur during fetal movement or uterine contractions. If the baseline is within the normal range (111–160 bpm), accelerations may reach 171–180 bpm.
In daily life, many first-time mothers lack sufficient knowledge about pregnancy and childbirth. To monitor the health of both mother and fetus, it is essential to confirm whether the fetal heart rate (FHR) falls within the normal range. So, what is the normal fetal heart rate?
Normal Fetal Heart Rate
The normal fetal heart rate typically ranges from 110 to 160 beats per minute (bpm). During early and mid-pregnancy, FHR is assessed via ultrasound; in late pregnancy—especially after 32 weeks—cardiotocography (CTG) or electronic fetal monitoring is used to evaluate FHR. The baseline FHR generally lies between 110–160 bpm. However, transient accelerations in FHR commonly occur during fetal movement or uterine contractions. When the baseline is within 110–160 bpm, accelerations may reach 170–180 bpm. Such accelerations, particularly when associated with increased fetal activity or stronger uterine contractions, are considered normal physiological responses.
A sustained fetal heart rate above 160 bpm—especially if persistently elevated to 180 bpm or higher—is considered unsafe. It is important to investigate potential causes of fetal tachycardia, such as maternal conditions including fever or underlying cardiac disease. Conversely, a persistently slow fetal heart rate (e.g., baseline ≤110 bpm with minimal variability) may indicate fetal compromise. Additionally, decelerations in FHR may suggest intrauterine fetal distress, warranting prompt medical evaluation and intervention.
During pregnancy, it is advisable to avoid spicy, heavily seasoned, or highly stimulating foods, and instead consume more fresh fruits and vegetables. Maintain regular work-rest schedules, avoid excessive fatigue, stay relaxed, and attend all scheduled prenatal check-ups. We hope this information is helpful to you!
