You should remember that once you have completed your course of treatment it may be necessary to attend one/two top up session(s), annually (on average). This is because new hair may grow on the body which was not originally there when you were undergoing your course.
Some clients will find they do not need this, whereas others will, it is dependent on the individual and goes down to the genetics and type/speed of hair re-growth.
If you do not come back to these “top up” sessions you may find some partial hair re-growth, which can be up to 20%. This is because the life-cycle of some hairs can be up to 18 months, and these may have not been treated in the original sessions. So in order to ensure you capture all hairs in the zones concerned top-up sessions are recommended.