Sage-Tips

What happens when a mother is Rh-negative?

If the mother is Rh-negative, her immune system treats Rh-positive fetal cells as if they were a foreign substance. The mother’s body makes antibodies against the fetal blood cells. These antibodies may cross back through the placenta into the developing baby. They destroy the baby’s circulating red blood cells.

What blood type does the mother have to be and what blood type does the fetus have to be for hemolytic disease of the newborn to occur?

Key points about hemolytic disease of the newborn HDN happens when an Rh negative mother has a baby with an Rh positive father. If the Rh negative mother has been sensitized to Rh positive blood, her immune system will make antibodies to attack her baby.

Can parents have the same blood type?

Neither of your parents has to have the same blood type as you. For example if one of your parents was AB+ and the other was O+, they could only have A and B kids. In other words, most likely none of their kids would share either parent’s blood type.

What is the blood type of a child of two parents?

Each parent gives one of their two ABO alleles to the child (3). Mother with AB blood type can either pass the A or B allele to the baby. Likewise, a father with O blood type can only pass O allele to the baby. If both parents belong to the blood group O, the child will also belong to the O blood group.

Can two people with B blood type have a baby?

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.

Can a man with B or O blood have fathered this child?

The letters listed in that cell are the possible ABO groups of the father. For example, if the child is A and the mother is O, the father MUST be A or AB. It is biologically impossible for a man with B or O blood to have fathered this child.

How do you use blood types to determine paternity?

Using Blood Types as a Cheap Paternity Test. For example, if the child is A and the mother is O, the father MUST be A or AB. It is biologically impossible for a man with B or O blood to have fathered this child. NOTE: The two blank cells represent impossible combinations between mother and child, regardless of the father.