VA Â» Office of Public and Intergovernmental Affairs Â» History of Veterans Day. World War I â known at the time as âThe Great Warâ - officially ended when the Treaty of Versailles was signed on June 28, 1919, in the Palace of Versailles outside the town of Versailles, France.
If your blood mixes with Rh-positive blood, your immune system will react to the Rh factor by making antibodies to destroy it. This immune system response is called Rh sensitization. Rh sensitization can occur during pregnancy if you are Rh-negative and pregnant with a developing baby (fetus) who has Rh-positive blood.
1 If the mother is Rh-negative and the father is Rh-positive, there is a good chance the baby will have Rh-positive blood. 2  Rh sensitization can occur. 3  If both parents have Rh-negative blood, the baby will have Rh-negative blood. 4  Since the mother's blood and the baby's blood match, sensitization will not occur.