|Values are valid only on day of printing.|
PAPP-A is pregnancy associated plasma protein A and is a sequential immunoenzymatic assay that uses two monoclonal antibodies and external calibrators.
AFP and hCG are both measured using a non-competitive immunoassay that uses one antibody to capture the protein to a solid phase, another antibody to detect the protein, and external calibrators.
The estriol assay is a solid phase competitive immunoassay that uses an anti-estriol polyclonal antibody, labeled estriol, a solid phase antibody directed against the estriol antibody, and external calibrators.
Inhibin-A is measured using a non-competitive microtiter immunoassay that uses a detection antibody to subunit a, a capture antibody to inhibin subunit BA, and external calibrators.
Calculation of post-test risks uses a multivariate log Gaussian model. Risk estimates for DS and T18 are influenced strongly by maternal age.
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