Non invasive DNA testing uses pregnant women's blood and DNA testing technology to sequence the maternal peripheral plasma containing free fetal DNA, and analyze it to obtain the genetic information of the fetus. Because if the fetus has chromosomal abnormalities, it can cause changes in the content of maternal DNA, which serves as a standard for determining whether the fetus is sick. So, what are the influencing factors of non-invasive DNA? Below, the editor will share with you the relevant content about non-invasive DNA testing.
Gestational weeks
The testing time is 12-23 weeks, and the DNA concentration detected at a time lower than 12 weeks does not meet the requirements. It is also unethical to test pregnant women after 24 weeks, so non-invasive DNA testing is not accepted for pregnant women after 24 weeks.
Blood transfusion history
If pregnant women have had blood transfusions in the past one to three years, it is not recommended to undergo non-invasive DNA testing. In addition to the above two situations, the influencing factors of non-invasive DNA detection include the selection of blood collection tubes, transportation conditions, and factors during the experimental process. Below, we would like to supplement the group of pregnant women who are suitable for non-invasive DNA testing, hoping to be helpful to targeted mothers.
Suitable for non-invasive DNA testing:
1. Pregnant women who have not undergone prenatal diagnosis at the optimal gestational age.
2. Pregnant women who fear invasive prenatal diagnosis.
3. Pregnant women who cannot undergo prenatal diagnosis due to various physical reasons.
