3 doctors weighed in:

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

3 doctors weighed in
Dr. Carin Van Gelder
Emergency Medicine
2 doctors agree

In brief: 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%.

In brief: 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. Carin Van Gelder
Dr. Carin Van Gelder
Thank
Get help from a real doctor now
Dr. William Forsythe
Board Certified,
23 years in practice
171K people helped
Continue
108,000 doctors available
Read more answers from doctors