When I was 17 it was the end of the world Bikerunner to learn I was sterile, and I was sterile too. There was no possibility of any kind of therapy no matter how much could be imagined. It was a huge worry fr me for many years, and I wasted a lot of time in that worrying state, only to come to the same conclusion over and over again. There were also all the other issues I had in my life that I had no idea had any relationship to being XXY. I didn't start understanding that until well after I was married. So it was the end of the road for me, I'd totally had a enough of living, when I was 17.
There was no information other than library books, and they were so far out of date, according to one library I was mentally retarded. I got some hope out of that, I can't have KS and I'm not mentally retarded. That hope lasted about a week until I got to another bigger library.
I was hopeless at talking so even if there was someone to talk to, what was I going to talk about? I wanted to read stuff, and there was nothing. There was no internet, the same as everybody before me and for many after me. The generation since 1994 in New Zealand has been the most well informed generation since 1942, and still, for most of us, the possibility of being naturally fertile is zero.
When ICSI was first developed it was toted as being the 'cure all' for all XXY guys, but that isn't the case. It all depends on two things, 1, how big your balls are, and 2, how skilled your surgeon is. The newest technique for ICSI involves removing entire Seminiferous tubule bundles from the testes, and micro-disecting them in a dish (effectively) it is much more complicated than that.
My testes were officially 1.0mL bilaterally, but that's only because the orchidometer only goes down to 1.0mL In reality they were both much smaller than 1.0mL and whatever testosterone they were producing was enough to not cause LH to rise, and there was only a slight increase in FSH. So I didn't fit the pattern expected. I'm not excessively tall, and I never have been. I was really interested in sports as a child, I even got picked a couple of times for our Primary schools Rugby team. I enjoyed sports, and I was very competitive before puberty, and after the start of it too.
Anyway, I don't know how big your balls are now, but they need to be about 6.0mL in volume for you to have any chance of having just 1 sperm. I do have a picture on an XXY guy with balls 6.0mL's so I know it's possible. And Dr Silber says 'the bigger they are the better.' So less that 1.0mL is really not big enough.
XXY is chronic, KS doesn't have to be. Do every legal thing you can to have a family, if that's what you want achieve it, don't just worry about it, do it. When you've sacrificed everything you own and have not achied a family then you can say 'it's impossible' until then anything is possible. If you give up you'll spend your life regretting it. So don't give up. Whilst there's still breath in your lungs there hope, take my word for it, if you can't see anything good in your words.