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Newborn Screening Program

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  • Mailing Address:
    Newborn Screening Program
    New York State Department of Health
    Wadsworth Center
    Empire State Plaza
    P.O. Box 509
    Albany, NY 12201-0509
  • Phone: (518) 473-7552
  • Email: nbsinfo@health.state.ny.us

My Baby is a CF Carrier: What does it mean for my baby? What does it mean for me?

Your newborn baby was tested for a condition called cystic fibrosis (CF) while in the hospital. CF causes breathing and digestive problems. Babies who test positive for CF must have a follow up sweat test to see if they have this condition. If the sweat test is negative, then you should not worry that your baby has CF.

Some newborns who test positive for CF are CF carriers. CF carriers do not have cystic fibrosis. CF carriers do not need special medical care. But if your baby is a CF carrier, then either you or your partner is a CF carrier, too. It may be that both you and your partner are CF carriers, and you could have a baby with CF in the future. This brochure explains what it means to be a CF carrier.

What is a carrier?

Our bodies are made up of tiny building blocks called cells. Inside the cells are thousands of instructions called genes. Genes tell the body how to grow and develop. Some genes determine what we look like (hair color, eye color, etc.). Each gene comes in a set of two. One copy of a gene in each pair comes from our mother's egg. One copy comes from our father's sperm. We all have "mistakes" (called mutations) in a few of our genes. When one copy of a gene has a mutation in it, the other copy is usually working fine. A carrier is a healthy person with a gene that is not working because of a mutation. If both parents have mutations in the same gene, then their baby could be born with a health problem.

What is a CF carrier?

How does a person get CF?

A CF carrier has one working copy of the "CF gene." The other copy has a mutation in it. The CF gene affects how salt moves through our cells. A CF carrier does not have cystic fibrosis, because one CF gene is still working fine.
What is a CF carrier? - Click image to see larger view with explanation.

A person has cystic fibrosis when both copies of the CF gene have mutations in them. When a mother and father are both CF carriers, each of their pregnancies has a 1 in 4 chance for the baby to have cystic fibrosis.
How does a person get CF? - Click image to see larger view with explanation.

How can I find out if I am a CF carrier?

A blood test for you and your partner can tell which parent is a CF carrier like the baby, or if both parents are CF carriers. This blood test can tell more about your chances to have a child with CF in the future. Your health care provider may order the test and discuss the results. A genetic counselor can help you learn more about CF carrier testing and arrange for you to be tested. The CF Care Center where the baby was sweat tested may also offer CF carrier testing.

When your child grows up, he or she should be told about the CF carrier test results. Someday his or her partner may decide to have a CF carrier test as well.

Any blood relative (brother, sister, aunt, uncle, cousin, etc.) of a CF carrier might also be a CF carrier. Learning about the baby's CF carrier test results may help family members decide about CF testing too.


The above information is also available as Adobe Portable Document Format (PDF) file "For Parents and Families - My Baby is a CF Carrier: What does it mean for my baby? What does it mean for me?"

The Adobe Acrobat Reader software is required to view and print the pdf format. [ Adobe Acrobat Reader. ]

For more information, please contact the Newborn Screening Program. .


Adapted with permission from the March of Dimes; the Cystic Fibrosis Center, St. Vincent's Hospital, Manhattan; and Wadsworth Center, New York State Department of Health.