When to do 3D color Doppler ultrasound

Women will do B-ultrasound many times during the whole stage of pregnancy. Three-dimensional color ultrasound is also done in a certain month of pregnancy. Three-dimensional color ultrasound has many advantages. It can understand the baby's development more clearly than traditional B-ultrasound, and see if the baby has any deformities, especially it can clearly see whether there is cleft lip. After all, there are many children with cleft lip now. So when should three-dimensional color ultrasound be done?

Women can have three-dimensional color ultrasound when they reach a certain stage of pregnancy. This kind of color ultrasound will clearly observe the baby's condition and can also detect whether there are some deformities. Nowadays, more and more babies have deformities. So when should the three-dimensional color ultrasound be done? Let's learn about it below.

Generally, the first color ultrasound is done between 22 and 24 weeks of pregnancy. It is usually used to check whether the baby has any deformities, especially cleft lip on the upper lip, which is commonly known as cleft lip, which can be detected at this time. There is also the continuity of the spine, the condition of the internal organs, and so on. The most important thing is that you can see the baby's development, including the baby's biparietal diameter, head circumference, abdominal circumference, femur length, etc.

The second color Doppler ultrasound is usually done between 28 and 30 weeks, and is also used to screen for malformations. At this time, the baby has grown a lot, and you can see more clearly the parts that you didn’t see the first time. You can further understand the condition of the placenta, amniotic fluid, and the baby’s development. At this time, you can roughly understand the size of the baby, the maturity of the placenta, etc.

Around 37 weeks, another prenatal color ultrasound is required to check the condition of the placenta and amniotic fluid, as well as predict the baby's weight, whether the umbilical cord is around the neck, etc., to see if the expectant mother is suitable for natural delivery.

How many times should B-ultrasound be done during pregnancy? This depends on the specific situation of the pregnant woman.

If everything is normal during pregnancy, 1-2 ultrasound examinations will be sufficient during the entire pregnancy. So, when is the most appropriate time to do the first B-ultrasound? This is also a concern for many pregnant women. For the health of the fetus, if there are no special circumstances, it is best to do the first ultrasound examination at 18 to 20 weeks of pregnancy. During this period, the fetus's organs have been fully developed. A careful B-ultrasound examination can show whether there are any abnormalities in each important organ. Fetal malformations can be detected early and pregnancy can be terminated in time, with less impact on the mother's body. Later, if there are no abnormalities, you can wait until the last few weeks of pregnancy to do a second B-ultrasound examination to estimate the size of the fetus, understand the position of the placenta and the amount of amniotic fluid.

If fetal growth retardation is suspected, several B-ultrasound examinations are needed to clearly determine the effectiveness of treatment. If the amniotic fluid decreases in the late pregnancy, multiple B-ultrasound examinations are needed because the less amniotic fluid there is, the more likely the fetus will suffer from hypoxia and asphyxia at birth.

Currently, most countries recommend that normal B-ultrasound examinations be performed 1-2 times during pregnancy. How many times you need to do B-ultrasound during pregnancy depends on the specific situation. If it is not necessary, do not do B-ultrasound examinations frequently, especially do not use B-ultrasound to identify the sex of the fetus, because identifying the sex of the fetus requires a relatively long time to irradiate one part of the fetus, which may cause harm to the fetus due to the thermal effect of B-ultrasound. Legally speaking, it is illegal to determine the sex of a fetus through B-ultrasound and artificially select a fetus of a certain sex if there is no medical indication.

When should a three-dimensional color ultrasound be done? A woman can have such a color ultrasound around the 22nd week of pregnancy. This will give her a good understanding of the baby's development. In the later stages of pregnancy, the three-dimensional color ultrasound can also be used to help the expectant mother choose the method of delivery and see if natural delivery is suitable. Also, it is best for women not to do B-ultrasounds frequently during pregnancy.