But an abnormal fetal heart rate isn't necessarily cause for alarm. "Abnormal fetal heart rate patterns do not always mean there is a problem," says the American College of Obstetrics and ...

On the other hand, having a low fetal heart rate at an early ultrasound is associated ... of miscarriages are caused by fetal chromosomal abnormalities. One example is a blighted ovum, which ...

Abnormal presentations increase a woman's ... This can cause sudden, short drops in the fetal heart rate, called variable decelerations, which are usually picked up by monitors during labor.

Women were excluded if there was a known congenital anomaly, multiple pregnancy, the fetus required immediate delivery for abnormal fetal heart rate trace, maternal age was less than 16 years or ...