What if you have an RH Negative blood type?
If you are more than 12 weeks pregnant, we advise you to get an RH negative antiglobuline injection within 72 hours after the bleeding started when you used the abortion pills.
Usually doctors advise women wit a Rh negative blood type and who have a (surgical) abortion or miscarriage or delivery to have an injection with anti D globuline. The reason is that if the fetus has a positive bloodtype and if there is an exchange in blood, the woman can make antibodies in her blood that can affect the next born baby.
However, research with early medical abortion and first trimester (first 12 weeks) spontaneous abortions have shown that no or very little exchange in blood between the woman and the fetus takes place and that a woman does not make any significant number of antibodies that could affect the next fetus.
If you do not know what is your blood type, you can get a 12 USD test at Walmart (https://www.walmart.com/ip/Eldoncard-Blood-Type-Testing-Kit-Blood-Typing-Test-Kit-w-Instructions-Single/127022882)