I 'm looking for a rare blood type. It's for my book. It must be something the mother and child can have.

Answer 1

Blood type is inherited from both parents, NOT just the father.
It is possible for the child to have a blood type that is not the same as any parent.
Example: Mom is A positive
Dad is B positive
Child is AB positive
It is also possible for the child to have O positive if
Mom is AO positive ( another form of type A )
Dad is BO positive ( another form of type B)
Child is OO positive
I won't go into this in detail, because you learn this in blood banking.
There are also antibodies you can form after you get a blood transfusion. ( like "K").
"Bombay" is a rare form of type O blood. Is this what you are looking for? Bombay is found in India.

Answer 2

I know the RN above wrote that it's the father that determines the child's type. If this this is true then why Both my daughter and I are 0-, while my husband is 0+?

O Positive 37%
O Negative 6%
A Positive 34%
A Negative 6%
B Positive 10%
B Negative 2%
AB Positve 4%
AB Negative 1%

Answer 3

O negative is one of the most common blood types. You want AB negative.

Answer 4

O negative

Answer 5

ABnegative is the rarest blood type, and while a mom and child can have the same blood type, it is always the father that determines blood type in the child. A child will always have it's father's blood type.