Understanding Your Laboratory Test: What It Is and Why Your Doctor Ordered It

What is this test, and why might my doctor recommend it for me?

The Amphetamines Panel Test (Meconium) is a laboratory test that checks whether a newborn baby has been exposed to amphetamine or methamphetamine while in the womb. Unlike blood or urine tests that show recent drug use, meconium testing can detect drug exposure that occurred during the later stages of pregnancy, typically from about 20 weeks gestation until birth.

How does the test work, and what does it measure in my body?

Meconium is the dark, sticky first stool that a newborn passes. It forms during pregnancy and can accumulate drug metabolites (breakdown products) that cross the placenta from the mother's bloodstream. The test uses a confirmatory method called mass spectrometry, which is highly accurate and specific for identifying amphetamine and methamphetamine.

What happens during sample collection, and how should I prepare for it?

Sample collection is simple and non-invasive. Meconium is collected from the baby's diaper shortly after birth, usually within the first 24-72 hours of life. The sample is placed in a special container and sent to a laboratory for testing. No blood draw or painful procedure is required for the baby.

What do my results mean, and what should I do once I receive them?

A negative result means no amphetamines were detected in the meconium sample. A positive result indicates that the baby was exposed to amphetamines during pregnancy. It's important to note that a positive result does not necessarily mean the mother used drugs—it could indicate environmental exposure. Healthcare providers use these results along with other clinical information to determine the best care plan for the baby.