Too frequent B-ultrasounds in early pregnancy may lead to poor fetal development

　　The American Ultrasound Institute proposed that B-ultrasound should not be used as a diagnostic method for early pregnancy because early pregnancy fetus It is still in the sensitive period of cell division and organ differentiation. For the sake of caution, if it is not necessary within 3 months, no ultrasound examination will be performed. In other words, the first ultrasound examination will be performed after 12 weeks. When the doctor checks the results based on the symptoms reported by the pregnant woman, he suspects Grape fetal, Ectopic pregnancy Or pregnancy combined, ultrasound examination at 11-14 weeks of pregnancy will show a complete image of the fetus, which can diagnose whether the fetal development is consistent with the gestational age, whether there are multiple fetuses, etc.

　　Nowadays, many obstetricians and gynecologists in China do not recommend that pregnant women under 18 weeks of pregnancy undergo B-ultrasound, especially within 12 weeks of pregnancy. Because too much B-ultrasound may be the "murderer" of abnormal embryonic cell division and human brain formation, as well as fetal skeletal dysplasia, malformation or stillbirth.

　　However, factors affecting ultrasound observation have also increased accordingly, such as relatively small amounts of amniotic fluid and relatively fixed fetal position, which affect the detection of fetal malformations. In addition, some fetal malformations only appear during a specific gestational age or at a specific time, and some require obvious morphological changes before they can be detected by ultrasound. This also limits the correct detection rate of ultrasound.

　　Nowadays, many obstetricians and gynecologists in China do not recommend that pregnant women under 18 weeks of pregnancy undergo B-ultrasound, especially within 12 weeks of pregnancy. Because too much B-ultrasound may be the "murderer" of abnormal embryonic cell division and human brain formation, as well as fetal skeletal dysplasia, malformation or stillbirth. However, if a pregnant woman has worrying symptoms in the early stages, such as vaginal bleeding, sudden stomach ache , use B-ultrasound to determine whether the embryo is viable and whether the pregnancy can continue； Yes or no abnormal pregnancy For example, ectopic pregnancy or molar pregnancy is the most direct and reliable method. It is wise to actively cooperate with the doctor's examination.