Pregnancy B ultrasound can do at any time? These five time points are ideal, and the fetal condition should be mastered

8 weeks of pregnancy is the first time B-ultrasound, this examination is very important, can understand whether the fertilized egg is implanted in the intrauterine cavity, exclude the existence of ectopic pregnancy and hydatidiform mole, after all, the occurrence of these two problems will cause great harm to the mother, and even lead to massive bleeding. Generally, we can understand the size of the gestational sac through B-ultrasound, and then let the doctor know the situation of the fetus according to the size of the gestational sac. < / P > < p > about 16 weeks of pregnancy, we need to know the thickness of the posterior cervical translucency layer of the fetus through B-ultrasound. This examination can find out whether the fetus has developmental malformations. If we miss this time period of examination, the posterior cervical translucency will be absorbed by the body, so we can not understand the situation. < / P > < p > the best time of four-dimensional color Doppler ultrasound in 24 weeks of pregnancy, which is called large-scale teratogenesis, is mainly used to carry out a comprehensive examination of the fetal brain, bone, heart, kidney, bladder, lung and other parts of the fetus through dynamic color Doppler ultrasound, so as to correctly evaluate the development of various organs of the fetus. Four dimensional color Doppler ultrasound is an essential item, missing this time period will affect the examination results. After all, over the inspection time will be due to the continuous development of the fetus lead to uterine congestion, in the examination can not see clearly and can not be examined in detail, some problems can not be clearly detected. < / P > < p > generally, after 30 weeks of pregnancy, it is necessary to have a prenatal examination every two weeks, including heart, blood pressure, abdominal circumference, weight, etc., but also to increase B-ultrasound examination, especially in 32 weeks, which is the best time to check fetal position. If the fetal position is found to be abnormal and can not be corrected in time, with the continuous increase of the fetus, the activity in the uterus will become smaller and the fetal position is abnormal, which will make the pregnant women produce accidents and improve the difficulty of production. < / P > < p > at the 38th week of pregnancy, the fetus has matured in all aspects, has entered the waiting period, and can be delivered at any time. At this time, the maturity of placenta and the situation of amniotic fluid can be known through B-ultrasound, and amniotic fluid is the main feeding material for the fetus, too much or too little will affect the fetus, especially in the case of fast delivery, premature rupture of amniotic fluid will lead to fetal asphyxia. < / P > < p > warm tips: pregnant women should understand the accurate time point of B-ultrasound during pregnancy, so that they can correctly carry out the examination. Don’t think that B-ultrasound is dispensable. B-ultrasound in some time periods is of great help to the fetus and the mother, and understanding clearly can prevent injury. 08/16/2020