<s>[INST] i had unprotected sex with my boyfriend on 12th decemebr n i took unwanted 72 in next morning n my periods got over on 8th december i.e. it was my 4th day after my periods so is it safe? and again i had unprotected sex with him on 14th december and today it is 17 december so today can i take unwanted 72 it wil b safe or nt? pls help and my age is 20yrs [/INST] HelloThanks for writing to ChatDoctorYes, there are chances of pregnancy due to unprotected sex in second time. You can take unwanted 72, but its efficacy decreases after 72 hours.However, it is not 100 % effective even if it is taken within 72 hours. You should wait for your next period. If you have missed period then urine pregnancy test can be done.However, ultrasound of pelvis is the investigation of choice to confirm pregnancy. You can plan accordingly. Medical method of termination of pregnancy are effective up to 98% in early weeks. If needed you should consult your gynecologist. Take Care Chat Doctor.  </s>