RhoGAM is given to Rh-negative mothers in which situations?

RhoGAM is given to Rh-negative mothers in which situations?

• A. At 28 weeks gestation
• B. Within 72 hours of delivery of an Rh-positive baby
• C. After any potential mixing of blood (spontaneous abortion, vaginal bleeding)
• D. All of the above

Answer: (D)

RhoGAM works by providing anti-D antibodies that bind any fetal Rh-positive red cells in the maternal circulation, preventing the mother's immune system from mounting a sensitizing response. Because any event that allows fetal blood to mix with maternal blood can lead to alloimmunization, prophylaxis is given in multiple timing scenarios: around 28 weeks gestation to cover ongoing pregnancy, within 72 hours after delivery if the baby is Rh-positive, and after events that could cause fetomaternal hemorrhage such as spontaneous abortion or vaginal vaginal bleeding or other procedures. All of these situations are reasons to administer RhoGAM, which is why all of the above are correct. If there is already maternal anti-D antibody present, RhoGAM would not be used.

RhoGAM works by providing anti-D antibodies that bind any fetal Rh-positive red cells in the maternal circulation, preventing the mother's immune system from mounting a sensitizing response. Because any event that allows fetal blood to mix with maternal blood can lead to alloimmunization, prophylaxis is given in multiple timing scenarios: around 28 weeks gestation to cover ongoing pregnancy, within 72 hours after delivery if the baby is Rh-positive, and after events that could cause fetomaternal hemorrhage such as spontaneous abortion or vaginal vaginal bleeding or other procedures. All of these situations are reasons to administer RhoGAM, which is why all of the above are correct. If there is already maternal anti-D antibody present, RhoGAM would not be used.