Patient's question:
At 22 weeks pregnant, when is the appropriate time to do a cognitive ultrasound? When is it suitable?Doctor's answer:
The condition you mentioned is generally best evaluated with a 4D ultrasound between weeks 24 and 28 of pregnancy. This time frame can effectively rule out most fetal abnormalities. A 4D ultrasound can be performed after the first 10 weeks of pregnancy, but it is most suitable to do it between weeks 24 and 28. This is because around week 24, the fetus is in a period of rapid brain growth and development. By this stage, the baby's structure is well-formed, and the size of the baby and the amount of amniotic fluid are balanced. The baby has more space to move inside the uterus, and the echoes from fetal bones are less interfering, resulting in clearer images. Therefore, this is the best time to perform the ultrasound.