It is more common to be a
carrier of a genetic disease, such as
cystic fibrosis (CF), than to have the disease. If
tests show that you are a carrier of a disease, your partner also should be
tested. Both parents must be carriers of a disease for a child to get the
The tests are not 100% accurate, so a person may test
negative and yet be a carrier. If you are a carrier and your partner tests
negative, there is still a very small chance that you will have a child with
If you and your partner are
both carriers of the same genetic disease, there is a 1-in-4 (25%) chance that your
child will have the disease.
If you are not already pregnant, you may wish
genetic counseling to understand your risks and
options if you decide to have children.
This information is produced and provided by the National
Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National
Institute via the Internet web site at http://
.gov or call 1-800-4-CANCER.
WebMD Medical Reference from Healthwise
March 12, 2014
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this