How old should a fetus be to test for DNA?
For the best chance of success, a fetus should be at least 8 weeks. Due to the possibility that the mother’s DNA could be mixed in with that of the fetus, a known sample from the mother (e.g. cheek swab, blood sample) should also be shipped with the fetus. This sample will be used to confirm that the DNA from the fetus is unique to that of the mother. There is no additional charge for the mother’s sample.
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