孕期B超检查是指在怀孕期间,将检测探头放在孕妇腹部,利用探头发出高频声波,捕捉到部分反射回来的超声波,并将这些被捕捉到的超声波转换为数字信号,以黑白(或彩色)图像的形式显示在屏幕上,它是一种无损伤无痛苦的检测方法。作为产前检查的一个重要项目,B超检查可以清楚地显示胎儿较大器官的形态,胎儿在宫内的活动状况,羊水量的多少,胎盘的形态及位 B-ultrasound during pregnancy refers to the detection probe on the abdomen of pregnant women during pregnancy, the use of the probe emits high-frequency sound waves to capture part of the reflected ultrasound and these are captured ultrasound converted to digital signals to black and white (or Color) image displayed on the screen, it is a non-invasive and painless detection method. As an important item of prenatal examination, B-ultrasound can clearly show the morphology of larger organs of the fetus, intrauterine fetal activity status, the amount of amniotic fluid, placental morphology and location