PATERNITY CAN BE RULED OUT BASED ON BLOOD TYPE MATCHING IN MANY CASES.

ABO blood type calculator, Blood type matching - child, father and mother

ABO blood type calculator can be used to predict possibilities of paternity.

The calculator is used to determine either:

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

ABO Blood Type Calculator:

		Father's Blood Type
		A	B	AB	O
Mother's Blood Type	A	A or O	A, B, AB, or O	A, B, or AB	A or O	Child's Blood type Must Be
	B	A, B, AB, or O	B or O	A, B, or AB	B or O
	AB	A, B, or AB	A, B, or AB	A, B, or AB	A or B
	O	A or O	B or O	A or B	O

		Child's Blood Type
		A	B	AB	O
Mother's Blood Type	A	A, B, AB, or O	B or AB	B or AB	A, B, or O	Father's Blood type Must Be
	B	A or AB	A, B, AB or O	A or AB	A, B or O
	AB	A, B, AB or O	A, B, AB, or O	A, B, or AB
	O	A or AB	B or AB		A, B, or O

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 -

96% of women are liars, honest

The Scotsman, Scotland's National Newspaper
December 2004

NINETEEN out of 20 women admit lying to their partners or husbands, a survey on attitudes to truth and relationships has found.

Eighty-three per cent owned up to telling "big, life-changing lies", with 13 per cent saying they did so frequently.

Half said that if they became pregnant by another man but wanted to stay with their partner, they would lie about the baby's real father.

Forty-two per cent would lie about contraception in order to get pregnant, no matter the wishes of their partner.

And an alarming 31 per cent said they would not tell a future partner if they had a sexual disease: this rises to 65 per cent among single women.