Cynigir y prawf NIPT fel dewis amgen i brawf mewnwthiol fel y rhan hon o'r llwybr. Gan fod risg o gam-esgor ynghlwm wrth brawf ymwthiol, disgwylir i gynnig NIPT leihau'r risg hwn gan y disgwylir cynnal llai o brofion mewnwthiol yng Nghymru.
The NIPT test is offered as an alternative to an invasive test as this part of the pathway. As an invasive test has a small risk of miscarriage, offering NIPT is expected to reduce this risk as fewer invasive tests are expected to be undertaken in Wales.