Early screening generally refers to early Down’s syndrome screening, which is an early screening test for fetal malformations.
Early screening is mainly for Down’s syndrome, which is usually performed around 11 to 13 weeks of pregnancy, mainly through blood tests to determine whether the fetus is at risk for trisomy 21, etc. Early screening also includes NT, which is to check the thickness of the nuchal translucency, to determine whether there is any developmental abnormality in the fetus.
The accuracy rate of Down’s syndrome detection is around 85% to 90%, because Down’s syndrome is a chromosomal abnormality, the child will be born with symptoms such as mental retardation, inability to take care of himself, facial deformities, etc. Therefore, when the high risk of Down’s syndrome is detected, it is recommended to do amniocentesis or non-invasive DNA comprehensive assessment in time, and terminate the pregnancy as early as possible if necessary.