Many parents confuse three-dimensional, four-dimensional, and three-level screening with large-scale screening. The first two are just surface imaging, a systematic examination of the baby's body, while the latter two are more detailed and focus on certain aspects. So what is the difference between tertiary screening and major screening, and where is the difference? Let's learn together.
After investigation, we have come to the conclusion that the examination time for tertiary screening is generally within 18-28 weeks, with the optimal time being 22-24 weeks. This type of examination can not only detect the possibility of fetal surface deformities, but also provide early diagnosis of structural defects such as congenital coronary heart disease.
The main purpose of prenatal screening is to examine various body parts of the fetus, such as hands, feet, mouth, lips, etc., to observe whether there are abnormalities. The difference between it and the third level screening is quite significant from this perspective. One focuses on internal and external aspects, while the other is only a superficial examination. It is still easy to distinguish between the two.
Therefore, these are the differences between tertiary screening and major screening. I believe that by this point, many families who are still puzzled about it should have already obtained the answers they want. I hope this distinction can provide more families with the desired pieces of information.
