We have had unprotected sex on 20 October and the next day (oct 21) with in 16 hours she had a ECP. I need clarification as to when she will get her periods after having ECP. Her normal mensurable date is 27th of every month. does she get period twice in this month because of ECP ?. should i confirm that she is not pregnant after withdrawal bleeding? or else is it necessary to take urine test to confirm? if so, please let me know when should I take the urine test to get a precise result?