How many weeks can the 4D color Doppler ultrasound be later than

Four-dimensional color ultrasound is one of the prenatal examination items. It can help parents more clearly understand the organ growth and development status, growth and development status of the fetus, etc. It is very useful in prenatal examinations. Some people feel that it is not appropriate to do four-dimensional color ultrasound too late. So, how many weeks can the 4D color Doppler ultrasound be performed?

How many weeks can you not do 4D color Doppler ultrasound?

At present, medical advice is given that pregnant women can have four-dimensional color ultrasound starting from the 20th week of pregnancy, and continue until around the 28th week, and generally will not exceed 30 weeks. This is mainly because after 28 weeks, the fetus's limbs and organs have basically grown and developed, and whether there are deformities, developmental disabilities and other problems can be clearly seen. After this stage, there is no need to do four-dimensional color ultrasound, and new test items have been used to replace them.

The effect of four-dimensional color ultrasound is very good. It can help us diagnose whether the fetus has malformations or congenital heart disease problems, and help us do a check on the health of the fetus in advance. However, the frequency of testing is limited and cannot be done for a long time. The frequency of testing also needs to be controlled. It is best for expectant mothers to do the four-dimensional color ultrasound at the required time and with the appropriate frequency.

When is the best time to do four-dimensional color ultrasound? Generally speaking, the best time to take a four-dimensional color Doppler ultrasound is during the 24th to 28th week of pregnancy, because the fetus's brain is in a rapid growth and development stage around 24 weeks. The fetal structure at this stage has been formed, the size of the fetus and the amniotic fluid are moderate, the activity space in the uterine cavity is large, the echo effect of the fetal bones is relatively small, and the image is clearer.

Four-dimensional ultrasound has real-time dynamic effects based on three-dimensional ultrasound. Pregnant fathers and mothers can watch the baby's physiological activities in the mother's belly, such as moving, breathing, swallowing, yawning, and sticking out the tongue, through the screen, which is very vivid.