The Double Marker Test is a prenatal screening test performed during the first trimester of pregnancy to assess the risk of chromosomal abnormalities in the fetus, such as Down syndrome (Trisomy 21) and Edwards syndrome (Trisomy 18). It measures two specific markers in the mother's blood—free Beta-hCG and PAPP-A—and combines these results with maternal age and ultrasound findings to provide a risk assessment. This non-invasive test helps expectant parents make informed decisions about further diagnostic testing and pregnancy management.
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