I also want to add that if you have ANY questions about the rh factor and the effect it can have on pregnancy or when/why/what medications you are being prescribed, please talk to your doctor about it. I have a lengthy history of miscarriage and it's been a long and traumatic journey to parenthood for me and my DH. But having doctors who actually listened to me, cared about me, and are doing everything they can to help me figure out why I've miscarried so often and how to best help me get to term in spite of my issues has been absolutely key to keeping me sane through the years. A doctor with empathy and compassion and the willingness to listen to your fears while explaining what they are going to do to help you is a doctor you want to keep. So talk to your doctor if you are concerned about the rhogam shot and want to know more about why it's being given now. And if they don't make you feel like your worries are being heard, then switch doctors.