At a Glance
Why Get Tested?
When to Get Tested?
When a newborn baby has no stools in the first 24 to 48 hours of life (meconium ileus) or when a person has symptoms of CF; if a person has a positive sweat chloride or an immunoreactive trypsin test or a close relative who has been diagnosed with CF; or when a patient is undergoing genetic counselling and wants to find out if they are a CF carrier. In addition, high risk carrier couples may have the test prior to in vitro fertilization so that the test can be carried out before implantation.
A blood sample taken from an infant's heel; a spot of blood that is put onto filter paper; or a blood sample taken from a vein in the arm