When should a pregnant woman not have a 4D ultrasound and when is the best time in the tenth month of pregnancy? This test can be done if the pregnant woman’s amniotic fluid is moderate. However, due to the fetal position, placenta and different stages of pregnancy, it is recommended that the best time for 4D ultrasound should be 12-30 weeks, when the images of the fetus’ face and body structures can be fully obtained. In the tenth month of pregnancy, it is best to have two 4D ultrasounds if possible to observe the growth of the fetus from time to time. The first examination: choose around 22 weeks of pregnancy The 4D ultrasound is done when the pregnant woman is more than 5 months pregnant. During the observation, it is obvious that the fetus is larger than the last observation, and the entire structure of the fetus cannot be fully displayed on the same image. The fetus can be partially observed to see if it is sound and if some other symptoms appear. If this is true, there is a high probability that the fetus is growing abnormally and is obviously unhealthy. Second examination: around 30 weeks of pregnancy Around 7 months of pregnancy is also a good time to do 4D ultrasound examination. During this period, the subcutaneous fat and facial expression of the fetus will be fuller and clearer. It is also possible to see the fetus’ physical movements and facial expressions in the mother’s body. The examination at this stage can provide more clarity on whether the fetus is developing normally. This is especially important for the health of the fetus in the late stages of pregnancy, so it is important to have a good and detailed examination. By burning a CD with 4D ultrasound, pregnant mothers can clearly feel the baby’s little changes and see their every move with their own eyes. At the same time, through 4D ultrasound, the development of the fetus can also be observed, which can be used as a basis to provide an accurate diagnosis of fetal congenital disorders. If the condition is congenital, the pregnant woman can consider whether to keep the fetus in the early stages of pregnancy, while at a later stage, she can consider if she can do her best to alleviate the condition.