Hello, I had 6 treamtments on my chest and abdomen and have had good results so far. I would say around 60% gone overall and much thinner then before.
I’m in my mid 20’s and males on both sides of my family are fairly hairy. On my father’s side, the men have hair on their backs, including my father, who has a good amount.
Surpringly though, he has quite a bit LESS hair on his chest/abs than when I started my chest/abs treatments! 
On my mother’s side, they don’t have hair on their backs but are hairy on the front. Also, they don’t suffer from male pattern baldness, as opposed to my father’s side.
It seems I have the hair pattern’s of my mother’s side, as I’m not losing any hair (on my head) yet, whereas my father was thinning out a bit at my age already.
Also, I have a maybe 10 small hairs scattered accross my back, so I don’t really suffer from back hair. I do however have an oily skin with naturally wide pores.
So, my questions are: (for dermatologists or people who have a similar genetic background as I do)
How much did hair grow past your thirties, especially on your chest/back?
Or does my age (mid 20s) somewhat guarantees that the majority of my hair has grown, considering it has not grown much at all since I was 20…?
I’m hoping the 10 or so hairs on my back will not keep growing, which concerns me a little. I’m already taking care of my chest, the last thing I want to have another part of my body requiring some work! 
Thanks!