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A 28-year-old male asked:

what is the definition or description of: abnormal fetal heart rate?

3 doctor answers5 doctors weighed in
Dr. Dennis Higginbotham
Obstetrics and Gynecology 30 years experience
Varies: The normal fetal heart rate throughout pregnancy ranges from 110 beats per minute to 170 beats per minute. In labor the fetal heart rate should still be in that range but is often considered abnormal when decelerations are occuring
Dr. Boris Aronzon
Anesthesiology 24 years experience
Fetal HR: The changes in the fetal heart rate pattern, which usually are detected by fetal heart rate monitor (efm) that suggest that there may be a physiologic response to the normal labor or ongoing distress. Fhr undergoes constant adjustments in response to the fetal environment or stimuli. Fhr patterns are classified as reassuring, non reassuring or ominous.Efm was introduced in 1958 in yale university.
Dr. Nikolaos Zacharias
Maternal-Fetal Medicine 26 years experience
<110, or >160 bpm.: After the first trimester, the fetal heart rate should fluctuate between 110-160 beats per minute. Arrhythmias (skipped beats, tachy-/brady-arrhythmias) account for most pre-labor abnormal heart rates. Intrapartum fetal heart rate depends on fetal oxygenation and placental perfusion and is used to prevent death of brain injury during labor. Decelerations may be early, variable or late.

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A 36-year-old member asked:

What is a non-reassuring fetal heart rate tracing?

2 doctor answers10 doctors weighed in
Dr. Bennett Werner
Cardiology 44 years experience
Referral: Allow me to referral you to my colleague who is a perinatologist.
A 29-year-old member asked:

What is the likely explanation for low fetal heart rate during pushing?

2 doctor answers4 doctors weighed in
Dr. Bryan Treacy
Gynecology 35 years experience
Head compression: Expulsive efforts (pushing) increases compression of the fetal head. There are some dangerous patterns of low heart rate that may lead an obstetrician to intervene in this process.
A 42-year-old member asked:

What is a normal fetal heart rate at term?

1 doctor answer1 doctor weighed in
Dr. Nikolaos Zacharias
Maternal-Fetal Medicine 26 years experience
110-160 bpm.: 110-160 beats per minute.
A 40-year-old member asked:

What causes low fetal heart rate?

1 doctor answer2 doctors weighed in
Dr. Nikolaos Zacharias
Maternal-Fetal Medicine 26 years experience
Many causes.: Bradyarrhythmias (heart block, hypothyroidism, drugs) can lower the fetal heart rate persistently, however the most common reason is cord or placental accidents that threaten the fetal well-being. Your obstetrician and/or perinatologist should be able to help you avoid this problem.
A 43-year-old member asked:

Low fetal heart rate decelerations, i'm worried!?

1 doctor answer2 doctors weighed in
Dr. Adam Newman
Obstetrics and Gynecology 29 years experience
In labor?: How are you finding them? Checking at home or on a monitor in the hospital? Either way, go to your closest hospital and get checked to be sure that your baby is doing ok. Good luck!

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Last updated Jul 26, 2016

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