What is the normal value for first-trimester PAPP-A?

Pregnancy is a joyful event; however, it is also a relatively long process. Performing the first-trimester PAPP-A (Pregnancy-Associated Plasma Protein-A) screening during pregnancy can effectively help assess whether the fetus exhibits any abnormalities. Nevertheless, PAPP-A levels may sometimes be higher or lower than normal. So, what constitutes the normal range for first-trimester PAPP-A?

What Is the Normal Range for First-Trimester PAPP-A?

The normal value for first-trimester PAPP-A is generally greater than 1.0 MoM (Multiple of Median). First-trimester PAPP-A testing is one method used for early screening of Down syndrome (Trisomy 21). This test is typically performed around the third month of pregnancy (i.e., at approximately 11–13 weeks’ gestation). A PAPP-A result greater than 1.0 MoM usually indicates that the fetus is developing normally; conversely, abnormally low PAPP-A levels may suggest an increased risk of fetal abnormalities.

First-trimester PAPP-A testing measures PAPP-A—a protein secreted in large quantities by the placenta and decidua—to evaluate potential fetal developmental abnormalities. If abnormal results are detected, further diagnostic evaluation—typically via amniocentesis—is usually recommended in consultation with a healthcare provider to confirm fetal health status.

It is advisable to undergo regular prenatal examinations throughout pregnancy and use these visits to monitor fetal development and detect any potential abnormalities early. We hope this information is helpful to you.