Marriage of a woman (RH-) of a man (RH +) for their first and second child:
In the first child, a part of his blood (RH +) is mixed with his mother's blood at birth. Her immune system is stimulated to produce antibodies to the reusable adhesion factor of the risus factor, which normally does not infect the fetus and remains in the mother's blood.
In the second child, if the baby (RH +) moves some of the antibodies formed in the first pregnancy from the mother's blood to the blood of the fetus across the placenta, it breaks down the fetal blood cells and has an acute anemia that may lead to death.
RH-woman marriage of RH-man (for their first and second births):
Nothing happens to the first or second child to match (RH-) in both father and mother.
In the first child, a part of his blood (RH +) is mixed with his mother's blood at birth. Her immune system is stimulated to produce antibodies to the reusable adhesion factor of the risus factor, which normally does not infect the fetus and remains in the mother's blood.
In the second child, if the baby (RH +) moves some of the antibodies formed in the first pregnancy from the mother's blood to the blood of the fetus across the placenta, it breaks down the fetal blood cells and has an acute anemia that may lead to death.
RH-woman marriage of RH-man (for their first and second births):
Nothing happens to the first or second child to match (RH-) in both father and mother.