When is the imaging test for nuchal translucency typically performed during pregnancy?

The imaging test for nuchal translucency is typically performed between 11 and 14 weeks gestation. This timing is important because the measurement of nuchal translucency, which assesses the fluid accumulation at the back of the fetus's neck, is most accurately done during this specific window.

During these weeks, the nuchal fold is most prominent and can provide valuable information regarding the risk of chromosomal abnormalities, such as Down syndrome. Conducting the test outside this timeframe, either too early or later in pregnancy, may result in less reliable measurements and thus affect the accuracy of screening results. Therefore, performing the nuchal translucency test during the 11 to 14-week window maximizes its effectiveness in prenatal screening.