During pregnancy, some pregnant mothers lack knowledge about pregnancy. Once they find any abnormality, they will rush to the hospital for examination quickly, hoping to understand the growth of the baby as soon as possible.
Fetal heart rate monitoring can resolve many of the concerns of pregnant women. At the same time, pregnant mothers should fully understand the specific time for fetal heart rate monitoring, grasp the timing of fetal heart rate monitoring, and understand the fetal growth.
Why is fetal heart rate monitoring so important?
Fetal heart rate is the heartbeat of the fetus. Fetal heart monitoring examination uses ultrasound to monitor the condition of the fetus in the womb to determine the condition of the fetus. Fetal heart rate is regulated by sympathetic nerves and parasympathetic nerves. The monitoring graphic curve formed by the fetal heart rate changes at the moment of signal tracing can be used to understand the fetal heart rate response during fetal movements and uterine contractions, thereby inferring whether the fetus is hypoxic in the womb.
How long does it take to get a fetal heartbeat during pregnancy?
Generally speaking, the fetal heart will start beating at 3-4 weeks of pregnancy. It was slow at first, only sixty or seventy times a minute. At this time, the fetal heartbeat was still very weak.
Before 9 weeks of pregnancy, the fetal heartbeat can reach about 180 beats per minute.
After 14 weeks of pregnancy, the fetal heart rate slows down to about 140 beats per minute, and then maintains the heart rate at 120-160 beats per minute.
How are the fetal heart sounds?
Fetal heartbeat is a two-tone sound, like the ticking sound of a clock. Some people describe it as "like a train running" or a "horse running".
Abnormal fetal heart sound
In the absence of fetal movement, the fetal heart beats less than 160 times or less than 110 times, or the heartbeat is irregular, fast and slow, and skipping. Stops, gaps in between, etc. may be potential problems.
How to perform fetal heart rate monitoring?
When pregnant women undergo fetal heart rate monitoring in the hospital, they can do it when the fetal movement is good.
Posture
Take a sitting or semi-recumbent position with the abdomen exposed. The nurse will tie the two probes with elastic. Place the fetal heart rate probe on the expectant mother’s abdomen to listen to the fetal heart rate. , the contraction probe is placed at the fundus of the uterus.
Standard
The fetal heart rate monitoring time should be no less than 20 minutes each time. If fetal movement is felt more than twice within 20 minutes, and the fetal movement is accompanied by the baby's fetal heart rate increasing by more than 15 times/minute and lasts for more than 15 seconds, it should be normal fetal heart rate monitoring.
Some babies may fall asleep during fetal heart rate monitoring and do not move within 20 minutes. The heart rate monitoring can be extended to 40 minutes. If the baby does not move within 40 minutes, the fetal heart rate monitoring is still unqualified. .
Special circumstances
If the fetal heart rate monitoring is unsatisfactory, the doctor will ask the expectant mother to do it for more than 4 hours that day, and then do another fetal heart rate monitoring when the fetal movement is better, so it is accurate Mothers, don't be too anxious. Sometimes doctors will ask expectant mothers to monitor fetal heart rate for more than 4 hours.
Precautions for pregnant mothers during fetal heart monitoring
1. If you are lying down for monitoring, lean to the left when lying down.
Place a small pillow on your back and tilt your body at least 15 degrees to the left. This can reduce the pressure on the aorta and avoid false positive results due to insufficient blood supply to the placenta due to compression. .
2. Choose a time when the baby is awake, not asleep.
If the baby is sleeping or has little fetal movement, you can play some soft music or drink some sweet drinks to make the baby enter the awake period through food or sound. If the baby still does not wake up, it is best to let other expectant mothers do it. Breathe for 10 to 20 minutes at the door. It is not too late to come back and do it again.
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