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					Originally Posted by Siggy_lxvi  rather than having a period during those seven days you're taking the sugar pills, you'd be getting pregnant. | 
	
 You're having your period - which means you're (aprox) 14 days away from ovulating.  That's why you don't get pregnant on the sugar pills...you can't get pregnant during your period.
Let me clarify - you can END UP pregnant if you have sex during your period.  But you cannot get pregnant while you're having your period, as you are not ovulating.  Semen can stay in the body 7-10 days, and if you have a short cycle and end up ovulating within 10 days after your period, then yes, you can end up pregnant from the sex you had during your period.  But due to the fact that the bleeding is flushing everything out of your body, it's not likely.