Some pregnant women may have experienced multiple scans during NT examination. The reason is that after the first scan, the scan can not be found, and the doctor will let the pregnant mother go out for a walk. < / P > < p > sometimes it is possible to stroll for 3-4 times. It can be seen that NT examination is not so easy. It may be said that many pregnant mothers don’t know what such a troublesome examination is about. < p > < p > NT examination, in fact, is a prenatal examination item, also known as “nuchal translucency layer”. Of course, it does not refer to the neck of the pregnant mother. They were not related before, but an examination of the fetus. < / P > < p > doctors will scientifically calculate the cervical vertebra thickness of the pregnant mother’s belly through B-ultrasound, which is a very important item in the pregnancy examination of breeding pigeons. However, a large number of data show that the accuracy rate of NT examination in Down’s children detection is only about 80%, which can not be completely guaranteed, so the results can not be measured. < p > < p > because NT examination is not a compulsory examination item, many pregnant mothers do not do this test, so it is important for pregnant mothers to understand this aspect. < / P > < p > NT examination is actually the application of ultrasound scanning, will choose in the ultrasound department. In general, as long as the pregnant mother has passed the examination conditions, it can be checked. The change of NT is related to the number of gestational weeks, and the time for measuring the thickness of NT is very strict. It is usually performed at 11-13 weeks of gestation plus 6 days. < p > < p > 11-13 weeks, the probability of measuring NT thickness is very high, and it will drop to 11% by 14 weeks. Therefore, it is necessary to control the inspection time to avoid missing this inspection. < / P > < p > the gestational weeks mentioned above are calculated according to the last menstrual period of the expectant mother, rather than in the B-mode ultrasound in the early pregnancy. The doctors calculate the gestational weeks according to the specific development of the fetus. Mothers to be must remember carefully. < / P > < p > therefore, it is very necessary to do NT examination during pregnancy examination, which is also the first step to exclude abnormal situation of fetus and baby. Expectant parents can consult the hospital for specific information. < / P > < p > nt can detect all abnormal fetuses? Not at all. NT examination is also just a kind of screening, which is a way to judge whether fetal baby has abnormal conditions in the early stage. < / P > < p > this is the way doctors want the pregnant mother to wake up the baby or turn it over. There is no need to be nervous. Sometimes, the pregnant mother may move several times, and the fetus still can’t scan to the sagittal position. < / P > < p > at this time, the pregnant mother should not be in a hurry to get angry, because this kind of bad mood is likely to infect the baby. In this case, the pregnant mother can go out for a walk, eat something, and check again later. < p > < p > NT examination is the first and formal prenatal examination item for expectant mothers. It is inevitable that there will be some tension before doing NT examination. Several points for attention about NT examination are sorted out, and pregnant mothers can check it carefully. < / P > < p > to select the regular hospital NT as a very important production examination project, we must choose the regular hospital to do, so as to ensure the accuracy of the results. < / P > < p > as mentioned in the previous article, the time of NT examination is very strict and can only be done in those weeks, so it is necessary to make an appointment in advance. < / P > < p > and the appointment time should not be too early, generally not earlier than 11 weeks, or more than 14 weeks. Otherwise, even if the NT examination is completed, the results will not have any practical reference significance. < / P > < p > to relax, pregnant mothers may think that this is their first prenatal examination, or a check-up of deformities. There will be some nervousness, and it is normal that they may not sleep well the day before the examination. < / P > < p > if the anxiety still exists, you can go out for a walk with your family members, or listen to soothing music. Shopping is also a good choice. Fathers to be should give mothers to be enough care and encouragement. < / P > < p > in other aspects, if the pregnant mother chooses NT examination and 12 week delivery examination together, they should remember to be prepared for fasting, and the serum test is also required to be fasting. < / P > < p > we still have to insist on doing it. Moreover, NT screening is free in some areas, and the charge is not very high, so we still need to do it if we have conditions! Waistcoat line type abdominal abuse posture, shaping the perfect abdominal curve!