What percentage of individuals with Down Syndrome typically have ultrasound findings?

Individuals with Down Syndrome often present with characteristic findings detectable via prenatal ultrasound. Studies indicate that approximately 50% of fetuses with Down Syndrome will exhibit one or more ultrasound markers. This can include structural abnormalities such as increased nuchal translucency, heart defects, and other physical anomalies that are more prevalent in this population.

Recognizing that not all individuals with Down Syndrome will show detectable abnormalities on ultrasound is crucial; hence, while there is a significant presence of ultrasound findings in these cases, it does not reach the higher percentages that other options suggest. This understanding helps genetic counselors provide accurate information regarding the likelihood of ultrasound findings in pregnancies at risk for chromosomal abnormalities.