Non-Exclusion (Inclusion)
Definition
A finding that the alleged parent's blood group profile is compatible with parentage. Non-exclusion does not prove parentage: it means only that the person cannot be eliminated on serological grounds, and many unrelated individuals may share the same compatible profile.
- Field
- Serological paternity and kinship testing
- Meaning
- Cannot be eliminated on blood group grounds
- Limitation
- Does not prove parentage
Common questions
Why can't non-exclusion alone establish paternity in court?+
Blood group systems have relatively few common variants, so a large fraction of unrelated men are also compatible with a given profile. Non-exclusion narrows the pool of possible fathers without the statistical power that DNA profiling later provided.
Has non-exclusion testing been replaced by DNA profiling?+
In most modern jurisdictions, yes. DNA-based parentage testing has superseded blood-group serology for evidentiary purposes because it offers exclusion power and inclusion probabilities blood grouping cannot match, though the concept still matters for interpreting older case records.
Related terms
- Exclusion
- The categorical conclusion that one or more examined features are clearly inconsistent in a way that cannot be explained by projection angle,...
- Exclusion Probability (PE)
- The proportion of unrelated men in the relevant population who would be excluded as fathers of a child with the observed maternal...
- False Exclusion
- An incorrect serological finding that excludes a true biological parent. Causes include chimerism (two cell populations in one individual), rare antigen variants,...
- Paternity Index (PI)
- A likelihood ratio that compares the probability of the observed serological profile if the alleged father is the biological father to the...
- Phenotype
- The observable serological result for a blood group system, determined by which antigens are present on the red cell surface. Two people...