How long do I wear the patch? Orla from femSense March 23, 2022 12:59 Updated The patch is only worn during your fertile window, the days leading up to and just after ovulation, usually 5 to 7 days. Related articles Can I shower, take a bath or use a sauna while wearing the patch? Can I stick my patch before the predicted patch application day? When should I read my patch? Why couldn’t femSense detect my ovulation? I applied the patch too early, what can I do? Comments 0 comments Please sign in to leave a comment.