A screen positive result means that the risk of the baby being affected by Down syndrome or trisomy 18 is greater than the cut-off. For example, the screen cut-off for Down syndrome with enhanced First Trimester Screening is 1 in 350. Therefore, any result higher than 1 in 350 is considered screen positive. The screen cut-off varies between screens and conditions.
A screen positive test can be distressing for patients and their families, so it is important to explain that these types of tests are not diagnostic and will not provide definitive answers.
ALL pregnancies have a 2-3% risk for any birth defect, which may or may not be detected by prenatal screening.
My patient has screened positive, what are the next steps?