The elderly often say that the first three months of pregnancy are very important, and there will be many unstable factors during this period. But after three months, the mothers enter the second trimester and can go to the hospital to establish a file, which will also be accompanied by a B ultrasound examination.
But the report after the examination has to wait for the doctor to explain, may find a doctor to explain, many pregnant mothers will not be assured, but also need to ask other doctors. Sometimes a lot of professional terms will also make pregnant mothers in the clouds, and behind the incomprehension, there is more anxiety.
If the pregnant mother can't wait to know the baby's situation, she can learn to understand the important data on the B ultrasound list by herself, which will also be much more reassuring. Ultrasound examination at the age of 3 months of pregnancy is very simple, it will not take long before and after, and it will end after a short stay in the laboratory for a few minutes, and the doctor will operate the test very quickly. Then I waited for the B super list to come out and interpret the above data.
Here is the emphasis, there are 2 specific periods of data in the list, that is, the data that will appear during this pregnancy examination, which is very important and will not be displayed after this stage. If you understand these two data on the B super single, you can know the "little secret" of the fetus.
One .B 2 specific important data on the super single
1. Head and hip length
The fetal head in the third trimester of pregnancy is still relatively small, showing about 5 cm. Moreover, the fetus is curled up in the mother's body, which also brings certain difficulties to measuring the double top diameter and femur length, so the length of the buttocks, referred to as CRL, is generally measured. The length of the head and buttocks is medically defined, usually referring to the distance from the top of the fetal head to the bottom of the buttocks.
The standard data on head and hip length around the three months of pregnancy can refer to the following data: 10 weeks of pregnancy: 32.7mm-41.4mm pregnancy 11 weeks: 43mm-52.9mm pregnancy 12 weeks: 54.7mm-65.9mm pregnancy 13 weeks: 67.8mm-80.2mm
The head-hip length can be used to calculate the gestational week of the fetus, which = CRL (cm) + 6.5. For example, if the head and hips are 3.9 cm long, then gestational weeks = 3.9 + 6.5 = 10.4 weeks.
2. NT check
This test is closely related to the chromosomes of the fetus and is usually used as a screening indicator for Down syndrome. NT examination is commonly known as measuring the amount of space in the transparent layer at the back of the baby's neck. The normal effusion size will protect the fetal brain. For the standard of NT value, there are slight differences at home and abroad, and 3mm is the standard abroad, which is normal for this benchmark; In China, 2.5mm prevails, which is less than this benchmark.
If the NT test value is lower, the less likely it is to have Down syndrome, and this will be easy to pass. If the value is high, then the risk of having Down's is higher, accompanied by other symptoms, intestinal malformations, heart abnormalities and other problems.
Of course, the odds of Down are also related to the age of pregnant women, and the high risk of age is also high. If you are too high, don't worry too much, most of them will be transient lesions of the fetus, which will not last too long, and will eventually slowly return to normal levels.
Second.B other data that needs to be understood on the super order
1. Heart rate
At 3 months of pregnancy, the fetus's heart already has some functions, and the heart rate can be checked by ultrasound B. However, at this moment, the fetal heart rate index is not too stable, some are particularly high can reach 180 beats / min, these are small problems, and after the fetus grows slowly, the heart rate will gradually return to normal.
2. Amniotic fluid indicator
The survival environment of the fetus is inseparable from the amniotic fluid of the mother, when the pregnancy is 3 months, the amniotic fluid in the abdomen is about 30ml, and the detection of the B ultrasound will detect the depth of amniotic fluid at this time. As stated in "Obstetrics and Gynecology", it is normal within 2-8cm.
3. The development of the fetus at 3 months
At this time, the fetus began to take the shape of a person, the skin grew fine villi, the fingers also grew nails, and the iris of the eyes gradually began to develop, even if the small eyes were still closed. The head-body ratio is gradually coordinated, and at this time the fetus will already suck its fingers, its hands and feet will cross,it will swallow amniotic fluid, and it will also yawn. Moreover, after this stage, the probability of fetal deformity will be greatly reduced, and everyone can openly and honestly disclose the good news of the baby.
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