Ultrasound is probably the most frequent examination item that women come into contact with after pregnancy. B-ultrasound includes abdominal B-ultrasound and transvaginal transvaginal transvaginal ultrasound. The imaging of transvaginal ultrasound is clearer than that of abdominal B-ultrasound, so the diagnosis is more accurate. Patients do not need to hold their urine during vaginal ultrasound. However, it is difficult for ordinary people to distinguish professional terms related to ultrasound. For example, some people say that doing a three-dimensional ultrasound of the uterine cavity is equivalent to doing a negative ultrasound. Is that true?

Three dimensional ultrasound of the uterine cavity can be used for abdominal ultrasound or vaginal ultrasound.
Generally speaking, expectant mothers undergo a three-dimensional ultrasound examination of the uterine cavity and abdomen between 22 and 26 weeks of pregnancy. Through this examination, they can check whether the fetus has any abnormalities, and also discover whether the fetal bones, brain, and various organs are developing well. For pregnant women, this is a very necessary examination.
Three dimensional transvaginal ultrasound of the uterine cavity is mainly used to check whether there is a gestational sac in the uterus of women in early pregnancy, that is to say, it can be used to diagnose whether women in early pregnancy have intrauterine pregnancy or ectopic pregnancy. In addition, it can also check the size and position of the uterus, whether women have cervical hypertrophy and other issues, and some cervical diseases can be diagnosed by 3D ultrasound examination.
Three dimensional transvaginal ultrasound imaging is clearer than regular abdominal ultrasound imaging, and the examination time is shorter than regular abdominal ultrasound. However, pregnant women cannot undergo uterine three-dimensional transvaginal ultrasound again after early pregnancy, otherwise the probe may harm the fetus.