PREGNANCY ASSOCIATED PLASMA PROTEIN A (PAPP-A) IS SECRETED BY PLACENTA AND LEVELS ELEVATE WITH GESTATIONAL AGE. IT IS ALSO EXPRESSED BY A VARIETY OF TISSUES, BUT AT MUCH LOWER LEVELS. UNSTABLE OR RUPTURED CORONARY ARTERY PLAQUES, BUT NOT STABLE PLAQUES ALSO EXPRESS PAPP-A. THIS TEST IS USED FOR FIRST TRIMESTER PRENATAL SCREENING.
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2 ML (1 ML MIN.) SERUM FROM 1 SST. SHIP REFRIGERATED OR FROZEN.