What is the normal value for Down syndrome screening

Every family, when choosing to have a baby, wants the baby to make them more satisfied and more adorable, so many families want to fully understand what the normal value of Down syndrome screening is. The following content introduces the normal value of Down syndrome screening in detail for many people. If you want to have a comprehensive understanding, you can have a specific understanding of the following content.

Normal value of Down syndrome screening:

The alpha-fetoprotein (AFP) generally ranges from 0.7-2.5MOM, and the higher the chorionic gonadotropin, the higher the chance that the fetus will have Down syndrome. In addition, the doctor will input the alpha-fetoprotein value, human chorionic gonadotropin value, and the pregnant woman's age, weight, and weeks of pregnancy into the computer, and the computer will calculate the risk of the fetus developing Down syndrome. Different hospitals use different standards. Some hospitals' normal value standards are "less than 1/270" and some are "less than 1/380". However, a value less than the standard value may not necessarily be a foolish child, and a value greater than the standard value may not necessarily be a retarded child.

Inspection Principles

Through economical, simple and non-invasive testing methods, pregnant women at high risk of carrying certain congenital defects can be identified so that further diagnosis can be made and the birth rate of abnormal fetuses can be minimized. Prenatal screening usually refers to the detection of high-risk pregnant women carrying a fetus with congenital defects through the detection of maternal serum markers.

There are two periods for Down syndrome screening: the 9th to 13th week of pregnancy, which is called early pregnancy screening, and the 14th to 21st week + 6 days of pregnancy, which is called mid-pregnancy screening. Regardless of whether it is in the early or middle stages, pregnant women can generally get the screening results within a week after the blood test. If the result is high risk, there is no need to panic, because further chorionic villus sampling (early stage) or amniocentesis (mid-stage) will be required to perform fetal chromosome karyotype analysis to confirm the diagnosis.

Check time

Time: Early pregnancy: 9-13 weeks, mid-pregnancy: 14 weeks to 21 weeks + 6 days, preferably between 16 and 18 weeks.

The above introduces in detail what is the normal value for Down syndrome screening? Every pregnant woman must have a comprehensive understanding of these aspects. Only by understanding them, through comprehensive screening, can you compare yourself with the normal screening value? By comparing with your own normal value, you can keep your body healthy and ensure your health.