Yes, absolutely! In fact, you are encouraged to do so. Trying out the cup before you period comes can help you to master the techniques of inserting and removing it! We suggest doing some "dry runs" before your period, to get familiar with your body and how the cup sits in your vagina. When your period actually comes, it'll be much easier since you already know what to do. It is perfectly safe. You can even wear the cup ahead of time, when you are expecting your period.