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How do thy know if the mom or the baby is causing increased heart rate?

1 doctor weighed in
Dr. Nikolaos Zacharias
Obstetrics & Gynecology - Maternal Fetal Medicine

In brief: Tricky.

Sometimes the mother is the reason for the rapid fetal heart rate (e.
g. Maternal fever, hyperthermia), while other times it is the fetus (intrinsic cardiac disease, hyperthyroidism), or something in between (intraamniotic infection). Your obstetrician and/or maternal-fetal medicine specialist can give you a provisional diagnosis and plan of care while pursuing delivery or some other treatment.

In brief: Tricky.

Sometimes the mother is the reason for the rapid fetal heart rate (e.
g. Maternal fever, hyperthermia), while other times it is the fetus (intrinsic cardiac disease, hyperthyroidism), or something in between (intraamniotic infection). Your obstetrician and/or maternal-fetal medicine specialist can give you a provisional diagnosis and plan of care while pursuing delivery or some other treatment.
Dr. Nikolaos Zacharias
Dr. Nikolaos Zacharias
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