Enhanced first trimester screening (eFTS) and maternal serum screening (MSS) are both types of traditional multiple marker screening (MMS). If you have either of these screening tests in your pregnancy, it is important to know that they are not diagnostic and will not provide “yes” or “no” answers about conditions in your pregnancy.

Screening results

The results of prenatal screening are reported as a screen positive result or a screen negative result. Results will also include the chances that a baby has the condition screened for (e.g. 1 in 1000 chance).

Conditions screened

In Ontario, eFTS and MSS will screen for trisomy 21 (Down syndrome) and trisomy 18.

Timing of results

Your MMS results will be sent to your health care provider within 7-10 business days. You should discuss with your provider how you will receive your results – in person, over the phone.