###Human: Is it advisable to take Unwanted 72 after four days of sexual intercourse? ###Assistant: Hello. If her cycle is regular of around 28 days, there is 20 to 25 % chance of pregnancy. Unwanted 72 does not work effectively after 72 hours of unprotected sex, so no point in taking it now. If she misses her next period and pregnancy is confirmed, you need to consult a gynecologist for medical abortion as such medicines are not available over the counter and need a prescription. There is nothing right now (except for Cu-T insertion, which is invasive and unlikely to be acceptable), so you can just relax and wait for next period.