Fetal heartbeat is more or less a boy.
Fetal heart rate is regulated by sympathetic and parasympathetic nerves. Through the monitoring graph curve formed by the instantaneous change of fetal heart, we can know the reaction of fetal heart during fetal movement and contraction, and then infer whether the intrauterine fetus is hypoxic. From the 37th week of pregnancy, fetal heart monitoring should be conducted once a week. If there are complications or complications, you can do it at 28 ~ 30 weeks of pregnancy. Pay attention to whether the rhythm of fetal heart sounds is fast or slow. The normal fetal heart sound is 120 ~ 160 beats/min. If the fetal heart sound is above 160 beats/min or lasts for 100 beats/min, it should be treated in time.
It is rumored that if the fetal heart rate is lower than 140 beats/min, it is likely to be a boy; And 140 times/minute or more are girls. Is this statement credible?
In fact, the heart rate of girls is higher than that of boys, only at birth. When they are both fetuses, there is no difference in the heart rate between male and female fetuses. When a pregnant mother listens to the fetal heart, she will actually feel a change. However, the heart rate only changes with gestational age. Generally speaking, in the fifth week of pregnancy, the fetal heart rate is close to the mother's heart rate, that is, 80~85 beats/min. Then the heart rate gradually accelerated to 170~200 beats/min during the ninth week of pregnancy. In the second trimester, it gradually slowed down to 120~ 160 beats/min.
Therefore, the fetal heart rate is basically unreliable to see the sex of the fetus! But pregnant mothers should pay more attention to the fetal heart, because although it can't see the birth of boys and girls, it can reflect the development of the fetus!
The fetal heartbeat is somewhat normal.
Measuring fetal heart often produces a monitoring chart showing fetal heart, which can also be regarded as a special chart for checking fetal heart. Fetal heart rate is regulated by sympathetic and parasympathetic nerves. Through the monitoring graph curve formed by the instantaneous change of fetal heart, we can know the reaction of fetal heart during fetal movement and contraction, and then infer whether the intrauterine fetus is hypoxic. Fetal heart rate is a means to predict fetal safety, so it is necessary for every pregnant woman to keep a good record of fetal heart rate. At this time, pregnant women must know the normal range of fetal heart rate:
1, the normal fetal heart rate is 120~ 160 beats/min.
2. Before 20 weeks of pregnancy, the average fetal heart rate was 65438 062 beats/min.
3. During the 2 1~30 weeks of pregnancy, the average is 147 times/minute.
4. When the gestational age is 3 1~40, the average is 139 beats/min.
Usually, fetal heart sounds are loudest at the abdominal wall above the back of the pregnant fetus. Because the fetal head position is different, the loudest heart sound is different. It is good for pregnant women to learn to count their fetal heart rate every minute. If the fetal heart rate is less than 120 beats/min or more than 160 beats/min, it means that the fetal heart rate is abnormal and needs further review and monitoring.
How to measure fetal heartbeat
Fetal heart sound monitoring is one of the most direct and effective monitoring methods to observe the health status of the fetus in the mother. Fetal heart monitor generally draws the instantaneous changes of fetal heart and the contraction of mother into waveform curves through signals, which are intuitively reflected. At present, fetal heart sound monitoring includes fetal voice recorder, fetal heart rate or stethoscope. Fetal heart and stethoscope are widely used in general hospitals. Fetal voice recorder is accepted by most families because of its intelligent monitoring system. Let's look at the method of measuring fetal heartbeat.
1. In general, self-monitoring is not allowed before 15 weeks of pregnancy. For pregnant women with 15 ~ 25 weeks of pregnancy, it is generally measured 2 ~ 3 times a day, and each monitoring is kept at about 1 minute. After 28 weeks of pregnancy, the time and frequency of monitoring can be appropriately extended because the fetus is relatively well differentiated in the mother. For those high-risk pregnant women with hyperthyroidism and hypertension, they should be hospitalized in time to monitor fetal heart sounds.
2. Before 24 weeks of pregnancy, the position of fetal heart monitoring is generally in the middle of the navel of pregnant women or on both sides of the abdominal line. As the fetus grows in the abdomen, the position of fetal heart sound changes. After 24 weeks, the fetal heart sound transferred to the fetal back. In general, fetal heart rate in head position can be monitored under the umbilicus, and fetal heart rate in breech position can be monitored on the umbilicus of pregnant women.
3. The heartbeat of fetal heart is closely related to the breathing of fetus. The highest normal fetal heart sound is generally not more than 160 beats/min, and the lowest is generally not less than 120 beats/min. When the fetus is deprived of oxygen in the mother's body, the fetal heart sound will increase first, and then decrease gradually with the passage of time, so the low fetal heart sound is more terrible than the increase of fetal heart sound.
Precautions:
Often the direction of fetal movement is opposite to the direction of fetal heart, because fetal movement is caused by the activities of fetal hands and feet in the mother's body, and the positions of hands and feet are just opposite to the heart. Normal fetal heart rate is generally maintained between 120 ~ 160 beats/min. It is normal to occasionally appear too fast, too slow or irregular fetal heart rate. However, long-term fetal abnormalities should be admitted to hospital for observation.
Listen to the position of the fetal heartbeat.
Listening to the fetal heart is one of the contents of family self-monitoring of the fetus. In addition to pregnant women should learn to observe fetal movement, as a husband, if possible, it is best to learn to listen to fetal heart. So, where can I listen to the fetal heart with a stethoscope? What is the specific operation method?
Fetal heart is formed at the end of the eighth week of pregnancy, and the heartbeat of fetal heart can be detected by B-ultrasound. At the end of the 20th week of pregnancy, the fetal heart sound can be clearly heard from the pregnant woman's abdomen with the fetal heart stethoscope, and the frequency and strength of the fetal heart can be judged, so as to understand the growth and development of the fetus in the uterus.
Generally, auscultation is clearer on the back of the fetus. According to the fetal position, find the part of the fetal head, and then go down to find the clearest part. So that I can hear some experiences in the future. The frequency is fast, and 120- 160 times per minute is normal.
To hear the fetal heart correctly, we must first wear a stethoscope correctly. The method is as follows: the stethoscope is designed with a patented ear canal that conforms to ergonomics and a sinus that conforms to the angle of the ear canal. It can comfortably fit the listener's ear canal without making you feel tired and uncomfortable. Before wearing the stethoscope, please pull the ear tube of the stethoscope outward; The metal ear canal should be tilted forward and inserted into your external auditory canal, so that the ear sinus and your ear canal can be tightly closed. Everyone's ear canal is different in size, so you can choose the appropriate ear sinus.
Does it matter to measure the fetal heartbeat?
Fetal heart is mainly detected by ultrasonic detection technology. Its function is to reflect the condition of the fetus in the mother by monitoring fetal movement and fetal heart rate. Too fast or too slow fetal heart rate is a problem, and the data on fetal heart rate can roughly judge the health status of fetus. So does it affect the fetus to measure the fetal heartbeat with fetal heart rate?
Fetal heart monitoring is mainly used as an electronic instrument, and general maternity hospitals will provide fetal heart monitoring. Doppler fetal heart rate is commonly used in the market, and ultrasonic Doppler technology is mostly used, and its ultrasonic dose is small. At present, most fetal hearts on the market are lower than the national ultrasonic power difference standard by more than 50%. It mainly monitors fetal movement and fetal heart rate to reflect the situation of the fetus in the mother. After 35 weeks of pregnancy, pregnant women go to the hospital for a weekly check-up, and they all have to do fetal heart monitoring. But this can only be monitored at a specific time, not on demand, so it is necessary for expectant mothers to develop the habit of detecting fetal movement every day.
Fetal heart will not have radiation and biological effects like X-rays, so it will not harm pregnant women or fetuses in general.
In short, under normal use, it generally does not affect the fetus. The sound radiation dose of fetal heart rate is far below the requirements of safety indicators, but too much and too frequent listening to fetal heart rate will increase the unnecessary psychological burden of pregnant women to a certain extent, thus affecting the health of the fetus.