First Trimester Screening

Available in the 11th through 13th weeks of Pregnancy

A newer screening option, the First Trimester Screen (FTS), is available at GIVF to women of all ages who are interested in early information about the health of their pregnancies. This screening combines a specialized ultrasound examination with maternal blood testing. The FTS is the earliest and most accurate screening option available in pregnancy and poses no health risks to the pregnancy.

The First Trimester Screen (FTS) begins with an ultrasound examination measuring the tiny fluid filled sack at the back of the fetal neck, called the nuchal translucency.  An increased measurement may indicate a chromosomal disorder, a congenital heart defect or other birth defect, but can also be seen in normal fetuses.  A maternal blood test that measures pregnancy hormones (B-hCG and PAPP-A) is combined with the ultrasound measurement and maternal age to calculate a specific risk for Down syndrome and for Trisomy 18 or 13. 

Current studies indicate the FTS has a greater detection rate for Down syndrome and Trisomy 18 than second-trimester screening.  In addition, the FTS screens for Trisomy 13, which is not included in second trimester screening.  One of GIVF’s Genetic Counselors will call you to inform you of your results, which are usually available in three to four business days. If your results indicate an increased risk, additional diagnostic testing will be discussed with you by the genetic counselor.  If appropriate, this testing can be performed at GIVF.

If your pregnancy is already at high risk for chromosomal disorders due to maternal age or other factors, results from your FTS may be helpful in deciding if a CVS is right for you. Since CVS is only available until the 13th week, it is best to schedule your FTS early so you have time to consider your results.

For more information read our complete FTS brochure or view a video about the new FTS recommendations. .