When can I start the pill after using emergency contraception?

Women can start the contraceptive pill immediately after using emergency contraception, but she will need a backup method for the first 7 days of taking the pills (if she is taking the estradiol valerate/dienogest pill she needs to use a backup method for 9 days). Condoms can be used as a back-up method. If she doesn’t get her menstruation 2-4 weeks after using the emergency contraception she should take a pregnancy test.