How do different types of emergency contraception work?
Depending on where you are in your menstrual cycle, emergency contraception can: • Prevent or delay ovulation • Block fertilization • Keep a fertilized egg from implanting in the uterus If you’re already pregnant when you take oral emergency contraception, the treatment will be ineffective and won’t harm the developing baby. If you’re already pregnant when you have an IUD inserted, however, you could develop a serious infection or lose the pregnancy. Is emergency contraception appropriate for everyone? Emergency contraception isn’t appropriate for everyone. Your health care provider may discourage use of Next Choice or Plan B One-Step if you: • Are allergic to any component of Next Choice or Plan B One-Step • Have unexplained vaginal bleeding Next Choice or Plan B One-Step may be an option if you have diabetes, but your health care provider will monitor you closely. Your health care provider may discourage use of ParaGard if you: • Have uterine abnormalities that interfere with the pla