Multiple marker screening (MMS) tests are available in the first or second trimester of pregnancy. This OHIP-funded testing will give information about the chance of having a baby with trisomy 21 (Down syndrome) or trisomy 18, and can be organized by your health care provider using the appropriate screening requisitions. 

In Ontario, there are two options for MMS depending on how far along you are in pregnancy, availability and other factors.

 It is not necessary to have both eFTS and STS in the same pregnancy as these tests screen for the same conditions