First Trimester Screening

The First Trimester Screen (FTS) is available to women between 11 and 14 weeks of pregnancy and is a screening test for certain chromosome conditions. With FTS, a nuchal translucency (NT) ultrasound measurement is combined with the results from a sample of your blood to provide you with the chance that your pregnancy may be affected by Trisomy 21 (Down syndrome), Trisomy 18, or Trisomy 13.

In some centres, the blood work component of the FTS may not be available. In this case, you might only receive results based on the NT ultrasound and your age.

Most women receive the results of their FTS at the time of their NT ultrasound appointment. Your results will be discussed with you by a registered nurse or a maternal fetal medicine specialist (perinatologist). If you have further questions, you may wish to speak the Prenatal Genetics Clinic.

FTS also provides other benefits such as confirming your dates, confirming if it is a single or multiple pregnancy (twins), and by providing the opportunity for early detection of birth defects if they are present.

FTS does not provide you with a diagnosis of a condition in your pregnancy. It provides you with the chance that the pregnancy may be affected. To receive a diagnosis, you may qualify for prenatal testing such as amniocentesis or chorionic villus sampling (CVS). Your prenatal health care provider will provide you with further information on these testing options.

It is very important to remember that most babies are born healthy.

Nuchal Translucency Screen