U.S. doctors online nowAsk doctors free
Canada
A 44-year-old female asked:

Is a peternity blood test taken 22 yrs ago as effective as a dna test today?

2 doctor answers4 doctors weighed in
Dr. Carin Van Gelder
Emergency Medicine 25 years experience
No.: Blood testing just looks at blood type, and while a child's blood type has to come from two specific blood types, many people have the same blood type (ie many options would still exist for the father). Today's dna testing uses cheek swabs and establishes a more exact dna pattern - different companies tout different success rates but most are >98%.
Dr. Gurmukh Singh
Pathology 49 years experience
Depends: If paternity was excluded with blood group tests, there is no need for DNA test. If it was not excluded, than DNA testing is nearly certain to exonerate a false accused man with far greater sensitivity.

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

Related questions

A 28-year-old female asked:
1 doctor answer1 doctor weighed in
A 35-year-old member asked:
1 doctor answer1 doctor weighed in
A 25-year-old female asked:
1 doctor answer1 doctor weighed in
A 33-year-old member asked:
1 doctor answer1 doctor weighed in
A 33-year-old member asked:
1 doctor answer2 doctors weighed in

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
Last updated Dec 27, 2018

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.