There is usually no need for non-invasive when you are pregnant with a 34-year-old who has had a Down’s syndrome test.
Down’s syndrome test is a very common prenatal screening means, mainly to screen for the presence of Down’s syndrome children, and non-invasive refers to non-invasive DNA, mainly through the extraction of pregnant women’s venous blood to do genetic testing to determine whether the fetus suffers from chromosomal abnormalities of the disease.
If the pregnancy is 34 years old and the Down’s syndrome screening has already been done and the test results are normal, there is usually no need to do the non-invasive test again.
However, the Down’s syndrome test is divided into two tests, one is the early Down’s syndrome test, which is performed by ultrasound to detect fetal nuchal translucency and combined with serology. The other test is a mid-pregnancy blood test, and the risk of Down’s syndrome is calculated by taking into account the woman’s gestational age and weight.
During pregnancy, it is recommended that you attend regular checkups and seek early medical attention if you feel unwell.