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Fetal heart rate is continuously monitored for slow or abnormal heart rate patterns which may indicate fetal distress during labor. [7] If the exposed blood vessels are near the cervix or are at risk of rupturing, the newborn may be delivered via caesarean section as early as 35 weeks gestation.
A normal nonstress test will show a baseline fetal heart rate between 110 and 160 beats per minute with moderate variability (5- to 25-interbeat variability) and 2 qualifying accelerations in 20 minutes with no decelerations. "Reactive" is defined as the presence of two or more fetal heart rate accelerations within a 20-minute period. Each ...
4 Normal delivery, and other ... 659.7 Abnormality in fetal heart rate/rhythm; ... 678.1 Fetal conjoined twins; 679.02 Complications of in utero procedures
A Zigzag pattern of fetal heart rate (FHR) is defined as FHR baseline amplitude changes of more than 25 beats per minute (bpm) with a minimum duration of 2 minutes and maximum of 30 minutes. [19] However, according to another study, even a >1 min duration of the zigzag pattern is associated with an increased risk of adverse neonatal outcomes. [21]
The term is also sometimes used to designate late decelerations of fetal heart rate as measured by cardiotocography or an NST, even if there is no other evidence of reduced blood flow to the placenta, normal uterine blood flow rate being 600mL/min.
Pregnant women can also be exposed to toxins in the workplace, including airborne particles. The effects of wearing an N95 filtering facepiece respirator are similar for pregnant women as for non-pregnant women, and wearing a respirator for one hour does not affect the fetal heart rate. [119]
Wally was given a 3% chance to survive the pregnancy, but his brother, ... a maternal fetal medicine doctor at Texas Children's Hospital in Austin. ... Ezra's heart rate told them that at 26 weeks ...
Fetal development, neural tube defects, birth defects, and various other physical abnormalities (see below for specific ultrasound tests) NA Fetal heart-rate monitoring [9] Week 12 – onward Non-invasive Handheld abdominal doppler or fetoscope: Immediately Heart rate irregularities NA Genetic prenatal rests Carrier screening (Screen) [10]