Background: Whilst maternal age is an established risk factor for Patau syndrome (trisomy 13), Edwards syndrome (trisomy 18) and Down syndrome (trisomy 21), the aetiology and contribution of genetic ...

Trisomy is a genetic condition characterized by the presence of an extra chromosome. This means that the affected person has three copies of the 21st chromosome instead of two. The most common forms ...

In 2013, researchers reported an eye-opening case of a healthy pregnant woman with a puzzling prenatal test result. A routine genetic screen using cell-free DNA—a highly accurate blood test—suggested ...

Non-invasive prenatal screening techniques can detect chromosomal abnormalities including Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13). These ...