It is very important for mothers to do B ultrasound during pregnancy, and B ultrasound in the early stages of pregnancy can check whether there is an ectopic pregnancy, and can also check the size of the fetal buds and the development of the fetus.
Ultrasound B in the second trimester of pregnancy can check the child's face. Whether the nervous system and many other systems, such as the digestive system, are developing normally.
It is especially important to do B ultrasound in the third trimester of pregnancy, which can check whether there are many situations such as placenta previa and the maturity of the placenta, and finally decide whether mothers should terminate pregnancy, because this can play a very accurate judgment on the health of the baby before childbirth.
Therefore, B ultrasound is a check that mothers must do during pregnancy, but the various numbers on the B ultrasound list, mothers can't understand, what do they represent?
There are also some things that have been heard everywhere about B super singles, are they correct? Let's unveil the mystery of B super single together.
Many people say that from the B super single can know whether the baby is male or female, there is such a saying, the B super single on the baby's heart rate as long as around 140 is the baby boy, there is a saying that the double top diameter minus the difference in the length of the unit is greater than 20 cm, the baby is a boy.
In fact, these two statements actually have no scientific basis, they are pseudoscience. B super single can not know in advance whether the baby is male or female, and the mainland law also explicitly prohibits non-medical gender identification.
Although parents cannot know in advance whether the daughter they are going to welcome is still a son, they can know the health and development of the baby from the B super list.
Take 36 weeks as an example, let's take a look at the meaning of the number on the B super
The double top diameter refers to the widest length between the sides of the baby's head, and the BPD is written on the B ultrasound, and the standard length of the BPD for a 36-week baby is 90mm, which is about the size of an apple.
On this basis, long or short 6MM is a normal phenomenon, as long as it is within this range, mothers can not worry.
The abdominal circumference of the baby at 36 weeks is between 290mm and 360mm, which is about the size of a grapefruit, and the abdominal circumference is written on the B super single.
B ultrasound will also appear femur length and humerus length, they are FL and HL, in fact, refers to the baby's thighs and arms, thighs in 63mm to 75MM, arms in 57 to 67MM are normal, just like the size of yacon.
And B super single will also appear a FL / AC, that is, with the femur length divided by the abdominal circumference, which is a scientific budget, can predict the baby's development to a certain extent, in 20% to 24% are normal, beyond this range, you need to pay attention to the mothers.
Finally, there will also be an amniotic fluid index on the B ultrasound list, which is to get more accurate results and facilitate the understanding of the fetus's situation in the mother's amniotic fluid.
So the mother's uterus is divided into four quadrants, the depth of amniotic fluid is measured separately and then added, and the result is the amniotic fluid index.
The normal range is between 8 and 24cm, and too much amniotic fluid may cause premature birth, and may cause abnormal fetal position, so mothers must pay attention.
However, after reading so much knowledge about B super single, mothers do not have to worry too much, and they do not need to feel that this is a very complicated thing.
Because of this series of examinations, mothers will be guided by doctors, and if mothers have any questions or discomfort, doctors can solve them for mothers.
Therefore, mothers must cooperate with the doctor's examination to make their babies more healthy.