###Human: There was light bleeding after taking emergency contraceptive pill. Is it normal? ###Assistant: Hello. Unwanted 72 is an emergency contraception pill. If taken within 72 hours, it is effective up to 95 % to prevent pregnancy. Also, she got the periods on the same day. All factors are against the pregnancy to occur. It is very unlikely to get a pregnancy in your case. Light bleeding is common after taking the pill.