Multiple marker screening (MMS) tests are available in the first or second trimester of pregnancy. They will give information about the risk of having a baby with trisomy 21 or trisomy 18.

Which test to consider

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

• enhanced first trimester screening (eFTS) - available between 11-14 weeks' gestation
• maternal serum screening (MSS) - available between 14-21 weeks' gestation

How to get MMS

Your health care provider can organize this testing and will need to complete the appropriate screening requisition.

Results

The results of MMS will typically take 7-10 days and will be sent directly to the health care provider who ordered your screening.