If a woman chooses to begin with her patch change day as the first Sunday following day 1, it is necessary to use a backup form of contraception such as spermicide or condoms for the first week of patch wear. If a woman is late placing her patch in the first week, or more than two days late placing the patch in the second and third weeks, she should apply the patch immediately, and then use a back up form of barrier protection for a week.[6]