NIPT is a highly accurate screen for chromosomal conditions and is much better than older style screening tests at identifying whether a baby is or isn't affected by the conditions being tested. However, sometimes a pregnancy can be identified as high risk by NIPT but the baby does not have a chromosomal condition. The chance of this happening often depends on the age of the mother and the specific condition. The fact that this can happen is the reason that all high risk results should be confirmed by a diagnostic test (amniocentesis or chorionic villus sampling) to clarify if the baby does or does not have a chromosomal abnormality. All of this can be explained by the genetic counsellor during genetic counselling that is available for all high risk NIPT results from Genomic Diagnostics.