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Is paternity testing accurate during pregnancy?
After about 3 weeks, the placenta gradually formed and exchanged materials with the mother, so the free data of the fetus could be detected in the mother's blood. After six weeks of pregnancy, the free data concentration will reach 1%, which is enough. There is a Nahong creature in Jilin. You can go and have a look. All this was said by their director at that time. I hope I can help you.
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