Each individual hair on the human body is at its own stage of development. Once the cycle is complete, it restarts and a new hair begins to form.
When your hairs are at different stages of the hair growth cycle during treatment, they will grow out at different stages too. To treat all hairs, which are at different growth stages, you need to use Lumea every 2 weeks when you first start using it.
Do not treat the same area multiple times in one session as this will not improve efficacy.