Meanings Of Different Results Of Prenatal Screening

Results of blood screening tests are reported as the level of risk that the disorder might be present:

• A positive screening test result for aneuploidy means that your fetus is at higher risk of having the disorder compared with the general population. It does not mean that your fetus definitely has the disorder.
• A negative result means that your fetus is at lower risk of having the disorder compared with the general population. It does not rule out the possibility that your fetus has the disorder.

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