B-ultrasonography during pregnancy what is the purpose

Ultrasound is the use of physical properties of ultrasonic and acoustic characteristics of the organizational structure of the human body close a physical check of the combination of methods. B-type ultrasonic inspection method of diagnosis is obstetrics ideal, in the first half of the pregnancy, using b-mode ultrasound can diagnose pregnancy, stillbirths, Mole, ectopic pregnancy, pregnancy with tumor, uterine malformation, hydrocephalus, fetal malformations such as brain-free, these Diagnostics should be carried out in the upper arm when dirty filling. Pregnancy Hou half period, using b Super can diagnosis fetal position, and double fetal or more fetal, and amniotic fluid too much or too little, and fetal malformation, and fetal gender, and placenta positioning, to clear pregnancy advanced bleeding of causes, fetal head diameter line measurement, fetal Palace within situation, forecast fetal mature of--by placenta classification, sheep water how many, fetal double top diameter, to judgment fetal mature of and forecast fetal age.
But b-ultrasonography, after all, is the use of ultrasonic through human tissue of acoustic reflected, if repeated b-ultrasonography during pregnancy, on fetal development is bound to have a certain impact. Although the recent damage not evident, but long-term disease is reported. B-diagnosis in pregnancy unless necessary, do not always make ultrasonic through fetal tissue, so as not to interfere with the normal fetal development and metabolism, especially those who just want to know about sex and repeatedly do b-practice is absolutely not desirable. But there are reports elaborated b-no adverse effects on the mother and fetus, is simple, secure, and reliable method of diagnosis during pregnancy.