What is Down syndrome screening 1?

During pregnancy, pregnant women have to do a lot of examinations, and they should also pay attention to various issues during pregnancy. If any abnormal situation occurs, they should seek medical attention in time. Down syndrome screening is the most common pregnancy screening item. Let us talk about what Down syndrome screening is and learn about it.

1. Each person has 46 chromosomes, arranged in 23 pairs. Because the male sperm and the female egg each have 23 chromosomes, when the sperm fertilizes the egg and pregnancy occurs, a new life with all 46 chromosomes is formed. However, sometimes errors occur, causing chromosomal abnormalities. Down syndrome is one of these abnormalities.

2. At conception, the baby does not take one chromosome 21 from each parent and combine them together. Instead, a third chromosome 21 is squeezed in and then copied to all the cells of the baby's body. Down syndrome, sometimes called trisomy 21, is the most common chromosomal abnormality, affecting approximately 1 in 700 newborns.

3. First of all, there are inevitable genetic factors. At present, with the worsening of urban environmental pollution, such as living environment pollution, virus infection, chemical drugs, radioactive radiation, home decoration, oral contraceptives, aging, smoking, drinking and other bad habits will cause an increase in Down syndrome. Down syndrome is a chromosomal defect disease, in which there is an extra chromosome on chromosome 21, so it is also called trisomy 21 syndrome. The main manifestations are severe intellectual disability, strange facial features, low-set ears, wide-set eyes, thick neck skin, and limb deformities.

What is Down syndrome screening 1? The above introduces the knowledge about Down syndrome screening projects. After understanding this, we will have a clearer understanding of why we need to do these examinations and their significance. Therefore, during pregnancy, for the health of the baby and yourself, you must undergo regular examinations so that problems can be discovered in time.