U.S. doctors online nowAsk doctors free
A 39-year-old member asked:

If my sister's child has cf, what are the chances that my child will have cf?

2 doctor answers5 doctors weighed in
Dr. Derrick Lonsdale
Preventive Medicine 74 years experience
Slight to zero: You could be a carrier i.e. One gene only. Unless your husband is a carrier ( most unlikely unless distantly related), you have two chances in four of having a child who is also a carrier. Even if you are a carrier (because you came from the same parents as your sister) you will never have a CF child unless as above.
Dr. James Ferguson
Pediatrics 47 years experience
A worthy question: If this bothers you, have a test run to see if you are an asymptomatic carrier of the CF gene.(you have 50% risk of it) If not, you cannot have CF kids.If so, your spouse can be screened also.If he is not, no CF kids.If you both are, the risk would be the same as your sisters with 1/4 chance with each pregnancy.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership

Similar questions

A 28-year-old member asked:

What are the chances my child will be diabetic?

1 doctor answer3 doctors weighed in
Dr. George Valdez
Specializes in Family Medicine
High: If your child follows typical american diet and exercises as little as typical american kid. It takes extra effort to prepare good healthy meals, encourage healthy choices, and stay active with them. Diabetes and obesity are getting more and more common, but it doesnt just 'happen'.

Related questions

A 39-year-old member asked:
1 doctor answer1 doctor weighed in
A 43-year-old member asked:
1 doctor answer1 doctor weighed in
A 36-year-old female asked:
2 doctor answers10 doctors weighed in
A 25-year-old male asked:
1 doctor answer5 doctors weighed in
Last updated Oct 31, 2015

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.