In answer to a few questions on this matter, the only reason we suggest this is because having a period is a messy affair in itself, therefore – just make your life simple – deal with your period and then use your Vagi-Wave when it has ended. However you can use it straight away if you want, and use the spare nights up to the start of your next period as a dummy run, then begin 21 nights once the period has finished. Feed back from ladies who have done this is ; that by the time their next period had come and gone they felt more confident and comfortable within themselves and were less aware of it and felt less stressed with the whole Vaginismus thing.