How can i skip my period or delay it for one week when taking tri-previfem (triphasic birth control)? i only need to do this one time

Extra pills for a we: After 3 weeks on your current pack of pills you can immediately start on a new pack for one week. These 7 pills will take the place of "blank" pills at the end of a 4 week pack. Then go off the pills for a week to have your period. At this point it would be best to start on a whole new pack, to avoid confusion. Other option: finish out the new pack to delay menses by 2 more weeks.

It doesnt always: Work, but you could try continuing the active pills skipping the inactive ones.