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ANSWER: Studies have shown a significant excess (87%) of ABO incompatible couples in 102 persistently sterile marriages.

The same researchers also found that in 7 couples with markedly delayed fertility, the 9 children that did result were all blood type O, and hence would have been compatible with the mother.

It is crucial we have all blood types available to our patients.

Everyone has an ABO blood type (A, B, AB, or O) and an Rh factor (positive or negative).

Your ABO blood type is based on the presence or absence of the A and B antigens on your red blood cells.

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It's simply that you don't have a protein, and if your father's child gives the protein to your unborn child, you can become sensitized. All these studies consistently showed that if the father possesses an A antigen which the mother does not, there is a marked selection against the survival of the A offspring.There is a marked tendency of blood type O babies of blood type O mothers to be male as opposed to blood type A babies of type A mothers, who tend to be female.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.ANSWER: Well, I would not recommend one choose a mate based upon blood type, since, for example, I know many couples where the man is A and the woman is O (considered a very good combination in Japan! However, that same combination seems to work for me.There is some evidence that certain components having to do with fertility can be shown to be under the influence of blood type, in particular, the level of antibodies a woman secretes into her vaginal tract that are directed toward other blood types can be shown to be under the influence of secretor status and diet.Just like eye or hair color, our blood type is inherited from our parents.Each biological parent donates one of two ABO genes to their child.Paternity fraud is when a woman names the wrong man as a father for the purpose of forcing him to pay child support.The words 'paternity fraud' were in quotes as if they referred to someone's questionable characterization rather than a straightforward fact.