Can an a positive and o negative person have child?

Yes, an Rh-positive person and an Rh-negative person can have a child together.

The Rh factor is a protein that can be found on the surface of red blood cells. People who have the Rh factor are called Rh-positive, while those who do not have the Rh factor are called Rh-negative.

When an Rh-positive person and an Rh-negative person have a child, the child can be either Rh-positive or Rh-negative. If the child is Rh-positive, there is no problem. However, if the child is Rh-negative, there can be a problem called Rh incompatibility.

Rh incompatibility occurs when an Rh-negative mother has an Rh-positive baby. During pregnancy, the baby's red blood cells can cross the placenta and enter the mother's bloodstream. This can cause the mother's immune system to produce antibodies against the Rh factor. These antibodies can cross the placenta and attack the baby's red blood cells, causing a condition called hemolytic anemia.

Hemolytic anemia can be a serious condition, but it can be treated. Treatment for hemolytic anemia may include blood transfusions, medication, and plasma exchange.

Rh incompatibility can be prevented by giving the mother an injection of Rh immune globulin (RhoGAM). RhoGAM is a medication that contains antibodies against the Rh factor. When given to an Rh-negative mother, RhoGAM can help to prevent her immune system from producing antibodies against the Rh factor.

RhoGAM is usually given during pregnancy and after delivery. It is also given to Rh-negative women who have miscarriages or abortions.