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.
If youâre RH-negative, you get RhoGAM: 1  At about 28 weeks of pregnancy. 2  Within 72 hours after the birth if your baby is Rh-positive or if his Rh is unknown. 3  After any situation in which your blood and your babyâs blood may mix, like amnio or CVS, miscarriage, ectopic pregnancy or a hit to your belly.