Canadian Children's Rights Council - Conseil canadien des droits des enfants
www.CanadianCRC.com

Canadian Children's Rights Council - Conseil canadien des droits des enfants

Child Rights - Virtual Library, Resource Centre, Archives and Advocacy

Blood Type Comparison - CHILD, FATHER, MOTHER

Paternity Determination by Blood Type

Blood type can be used to disprove paternity in many cases.

The ABO blood type charts below can be used to predict the possibilities of paternity.

The charts below can assist you to determine either:

    1. The ABO blood type of the child when the blood type of the father and the mother are known (top chart), or

    2. The ABO blood type of the father if the blood type of the child and the mother are known (bottom chart).

ABO Blood Type Calculator

Blood Type Chart - Mother, Father, Child, paternity determination

ABO blood types can be complicated to understand. This is mostly due to the fact that the 'O-type' antigen is masked by the presence of an A- or B-type antigen. This is explained in the following chart, showing the different the genotypes that make up the blood types.

Genotype (DNA) Blood Type
AO or AA A blood type
AB AB blood type
BO or BB B blood type
OO O blood type

For example, two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types. If one parent has A and another has AB, they can either produce a child with A, B or AB blood types. If one parent has A and another has O, they can either produce a child with A or O blood types.

Rh Positive (Rh+) and Negative (Rh-) Blood Types

The Rh (+/-) factor is inherited separately from the ABO blood types. Similarly to the masking effect of the O gene in ABO blood types, the Rh negative (Rh-) gene is also masked by the presence of a Rh positive (Rh+) genotype. Therefore, a person may have a Rh + blood type and can still have an Rh - gene (See the chart below). Furthermore, 2 parents with Rh + blood types can have a child with Rh - blood type.

Genotype (DNA)

Blood Type

(+ , -) or (+ , +) Rh +
(- , -) Rh -



Globe and Mail
Canada's largest national daily newspaper

Mommy's little secret - 1 out of 6 Canadians are Victims of Paternity Fraud

The Globe and Mail, one of Canada's 2 national newspapers, The article contains info about children's identity fraud at The Hospital for Sick Children in Toronto, Canada.  December 14, 2002. 

Includes interview with employees of Hospital for Sick Children in Toronto, Ontario, Canada who admit they deny children's identity information to husbands/male partners of mothers who want to hide the real identity of their child because they had an affair. The U.N. Convention on the Rights of The Child specifically supports a child's human right to have a relationship with both his/her biological parents. In addition, this article is proof that The Hospital for Sick Children ("Sick Kids") supports paternity fraud. 

Further "Sick Kids" supports a mother's rights only, which they view, supersedes 3 other people's rights, namely, the rights of the biological father, the rights of the mother's male partner/husband and the child's identity rights. More ..

About The Hospital for Sick Children in Toronto, Canada.
Affectionately called "Sick Kids", is one of the largest paediatric academic health science centres in the world, with an international reputation for excellence in health care, research, and teaching.

Blood Type Chart - Mother, Father, Child, paternity determination