The recurrence risk with trisomy is 1% to 2% or the maternal age risk, whichever is greater. [2] There is a recurrence risk of 5% to 10% for an affected live-born infant in cases when a parent has ...

Gene editing techniques may eventually allow trisomy to be treated at the cellular level, according to an in vitro proof-of-concept study. Down syndrome is caused by the presence of a third copy ...