FTS

Question 1

What is the FTS?

Answer 1

First Trimester Screen.
Assessing fetal risk of chromosomal abnormalities.
Done between 11-13wks gestation.

Question 2

What does the FTS involve?

Answer 2

Involves:
TA USS- Nuchal Translucency (NT) measurement

Blood test- Checks Free BhCG, Multiple of Medians (MoMs) of two blood chemistry results, pregnancy-associated placental protein-A (PAPP-A)

Combination of both results with Mothers age allows for assessment of risk of aneuploidy.

Assessment carries an 85-90% sensitivity and 95-97% specificity for Down syndrome.

Question 3

When is the FTS performed?

Answer 3

Performed between 9+ and 13+6 weeks of gestation (ideally at 10+ weeks).