At what gestational age is the first trimester screening typically performed?

First trimester screening is typically performed between 11 and 14 weeks of gestation. This screening includes blood tests and an ultrasound to assess the risk of chromosomal abnormalities such as Down syndrome. The ideal timing for this screening allows for the collection of both maternal serum markers and the accurate measurement of the nuchal translucency, which is pivotal for risk assessment.

Performing this screening in the first trimester is advantageous because it provides expectant parents with early information regarding potential genetic issues, allowing for earlier decision-making if necessary. By adhering to this timeline, healthcare providers can ensure that the necessary protocols and tests are optimally utilized to evaluate fetal health effectively.

Other gestational age options either fall outside the recommended screening window or correspond to different screening protocols focused on later stages of pregnancy.