How long till hair grows back in full?!

I had my first session with the gentelase about just over 3 weeks ago. So far the results are AMAZING. I did full back shoulders and arms. I have dark hair with type 3-4 skin. My arms have pepper spots still which fall out when I squeeze them. My back has them as well but theyre not as dark, and the ones around my shoulders and trap have been all exfoliated out. Anyways my question is, how long should it be till the hair grows back in full, like to its full potential were I can see the true reduction I got? I want to wait that long before doing my next session because I want to see actual results. So far im still smooth and hair free, other then a few areas its grown in finer. But how long usualy does it take for it to be all out again?
thank you

My Laser place said after 2 months most of what is going to grow back will have come back but leaving longer gaps in between sessions will work out better value for money for example around at-least 3 months to make sure that all the hair has come back before you treat it. It also depends on different areas which have different growth cycles someone else in here can advise you on that. I would even consider waiting 4 months on certain areas.

I have heard that this is just a guide and that the hair will likely to grow slightly more after all your treatments is finished but not too much.

On this area, you will probably have enough hair come in from the next phase of growth about 10 weeks after your original treatment.