Understanding Your Results

What do the Prenatest® results tell me and my doctor?

The Prenatest screening test can provide helpful information about your pregnancy. In most cases, the test will show that your baby is not likely to be at increased risk for certain chromosomal disorders. In some cases, however, the test can alert you and your doctor that your baby may have one of these disorders.

It is important to remember that this is a screening test and that it does not provide a final diagnosis on the state of the fetus that you are carrying. The results obtained will confirm your level of risk of carrying a fetus affected by one of the most common birth anomalies.

Please note that the results differ for the Prenatest® and Prenatest® Plus services. Please see below for a description of the results for each service.

Prenatest®

LOW RISK

This means that your risk of having a fetus with trisomy 21 is lower than the established threshold value of 1/250. This does not guarantee that the fetus is not affected, but it tells you that you are at lower risk.

HIGH RISK

This means that your risk of having a fetus with trisomy 21 is greater than or equal to the established threshold value of 1/250. However, this does not necessarily mean that your fetus is affected. Your physician or a genetic counsellor will discuss your options with you, including diagnostic testing. Before proceeding with an invasive diagnostic test, you have the option of undergoing a non-invasive prenatal test free of charge.

Prenatest® Plus

LOW RISK

This means that your risk of having a fetus with trisomy 21 is lower than 1/2,500. This does not guarantee that the fetus is not affected, but it tells you that you are at lower risk.

INTERMEDIATE RISK

This means that your risk is between 1/2,500 and 1/251. While your result is not high risk, the Prenatest® Plus service allows you to undergo a non-invasive prenatal test free of charge if you wish to pursue further testing. Your physician or a genetic counsellor will discuss this option with you.

HIGH RISK

This means that your risk of having a fetus with trisomy 21 is greater than or equal to 1/250. However, this does not necessarily mean that your fetus is affected. Your physician or a genetic counsellor will discuss your options with you, including diagnostic testing. Before proceeding with an invasive diagnostic test, you have the option of undergoing a non-invasive prenatal test free of charge.