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When switching between pills, most doctors recommend that you go straight from one pill type to another with no gap or placebo pills in between. This way your level of hormones doesn’t have a chance to drop and ovulation can’t occur.
If you go straight from one pill to another without a gap, you may not need to use a backup plan or another form of protection. However, to be safe, your doctor may recommend you use a barrier method or other form of protection for up to seven days. Some providers recommend that you wait longer.