How normal is the fetal heart rate?
Fetal heart rate is an important index to judge the basic situation of the fetus. So, for those who want to judge whether the fetus is normal, how normal is the fetal heart rate?
In fact, the normal value of fetal heart is not completely unchanged, but will change with the increase of pregnancy cycle. Under normal circumstances, the normal range of fetal heart is generally 120- 160 times per minute. Before 20 weeks of pregnancy, the average fetal heart rate was 65438 062 beats per minute; During 2 1-30 weeks of pregnancy, the average fetal heart rate was 147 beats per minute; At 3 1-40 weeks of pregnancy, the average frequency was 139 times per minute.
Generally speaking, pregnant women before pregnancy 15 weeks do not need ultrasonic Doppler fetal heart rate for self-monitoring. It is safe for pregnant women with 15~28 weeks to measure their fetal heart rate three times a day, each time 1 minute. For pregnant women after 28 weeks of pregnancy, the fetal differentiation is completed, which can prolong the monitoring time and times. In addition, high-risk pregnant women after 35 weeks of pregnancy, such as pregnant women with pregnancy-induced hypertension and hyperthyroidism, should be hospitalized, and the fetal heart rate should be continuously monitored with a fetal heart rate monitor, and long-term monitoring can be carried out if necessary.
Therefore, it is very important whether the fetal heart rate is normal or not, which is very useful for judging some situations of the baby. Therefore, the mother must always measure the fetal heart rate to ensure that she can always know the situation of the fetus, in case of any accident, she can know it immediately.
What does fetal heart rate think of men and women?
Fetal heart rate is a commonly used index, and there has always been a saying among the people that it is very simple to judge whether the fetus is a boy or a girl. However, many people said that they had never heard of this statement. So, what does the fetal heart rate think of men and women?
Many people want to know whether they are pregnant with a boy or a girl when they are pregnant, so there are various methods circulating among the people, and watching the fetal heart rate is one of them. The general statement for this method is that if the fetal heart rate is lower than 140 times per minute, it is a boy; If the fetal heart rate is higher than 140 beats per minute, it is a girl. Many people will use this to judge whether they are pregnant with a boy or a girl.
In addition to watching boys and girls spread among the people, the fetal heart rate is actually more used to monitor the fetus. Some abnormal conditions will cause the fetal heart to be out of the normal range, so pay attention at this time. However, it should be noted that sometimes due to the influence of contractions, fetal movement, palpation and sound, the fetal heart will accelerate or decelerate briefly, and then return to the baseline level, but this situation generally lasts for about ten seconds, not long, and the change time of the fetal heart is also an important indicator to judge the health of the fetus. Therefore, once the fetal heart rate is not within the normal range for a long time, you should consult a doctor for professional help.
Is fetal heart rate accurate for men and women?
Many people have heard that fetal heart rate can judge whether the fetus is a boy or a girl, but many people question this method. So, is the fetal heart rate of men and women accurate?
In fact, it is unscientific for men and women to look at the fetal heart rate. The statement that "a girl with a high fetal heart rate" is only a matter of probability, but generally speaking, a girl's fetal heart rate will be higher than that of a boy, but it is not certain, so the sex of the fetus cannot be determined from the number of fetal hearts. The content of fetal heart monitoring examination is the monitoring graphic curve formed by the change of fetal heart at the moment of signal recording, which can understand the reaction of fetal heart during fetal movement and contraction, and thus infer the situation of intrauterine fetus, such as whether there is hypoxia or not. Moreover, the fetal heart rate will change with the increase of pregnancy cycle, so the fetal heart rate will be different in different pregnancy cycles. The normal fetal heart rate is between 120 beats/min and 160 beats/min. If the fetal heart rate lasts for more than 10 minute, less than120 minute or more than 160 minute, it indicates that the fetal heart rate is abnormal.
Therefore, the method that fetal heart rate can judge fetal sex is not scientific and reliable. In fact, the judgment of fetal sex requires professional inspection instruments or techniques to obtain more accurate judgment.
Methods of identifying fetal sex
There are many strange opinions about identifying the sex of the fetus among the people, such as "sour children and hot women", but most of these opinions have no scientific basis. In fact, there are many scientific methods, but they need the support of professional equipment or technology, and ordinary people can't detect them themselves. So, what are the methods to identify the sex of the fetus?
The first type is B-ultrasound. On B-ultrasound images, the reproductive traits of men and women are different, which can be judged according to this difference, but the accuracy of B-ultrasound judgment is only about 85% ~ 90%, and it depends on the experience of doctors, so the accuracy is slightly different. This method can generally be detected after the fetus is 4 months old.
The second is amniocentesis. When the fetus reaches 15 weeks, every 1 ml of amniotic fluid contains nearly ten thousand fetal cells, so taking out these amniotic fluid cells at this time and carrying out chromosome analysis can determine the sex of the baby. But this is an invasive examination method, which has the possibility of trauma. It is risky to screen for fetal health problems specifically for elderly pregnant women and families with family genetic history. Therefore, amniocentesis is not recommended for fetal sex examination.
The third is villus biopsy. The chromosome karyotype of chorionic cells is consistent with that of embryos, and the sex of the fetus can be known by detection. This method can judge the sex of the fetus around 10 week of pregnancy, and the accuracy rate can be as high as 90%. However, this method has a certain chance of causing abortion and may harm the fetus.