What is the role of B-ultrasound examination during pregnancy? Although expectant mothers all know that B-ultrasound examination is essential during pregnancy, they know very little about the role of B-ultrasound during pregnancy. Next, let’s take a look at the role of B-ultrasound during pregnancy. The role of B-ultrasound in pregnancy and the purpose of B-ultrasound examination during pregnancy. The purpose of B-ultrasound examination during pregnancy is to determine whether the growth and development of the fetus is consistent with the gestational age, determine whether the fetus has malformations, and understand whether the fetus is safe in the womb. In addition, the purpose of exams in different periods is different. Early B-ultrasound examination is to determine whether pregnancy, pregnancy position, gestational sac size and menopausal time are consistent, and to provide reliable basis for estimating the expected date of delivery.