I have heard that sometimes if or when you have a sweep that you can bleed afterwards. I'm rhesus negative and 36 weeks pregnant, and I'm aware that if I have any bleeding during my pregnancy that I need to have anti D. So I'm just wondering that if I am offered a sweep and if it did cause bleeding, would I need to have anti D? If so, it puts me off the idea of having one. I'm just not sure at that late stage if you would need anti D or not.