Just want to chime in with another J-poucher here with infertility but a happy ending!
I got my j-pouch when I was 15 in 1997, there were no statistics on the surgery and infertility at the time... I got married at 28 and started trying the next year, then happened upon some research that showed it was very likely I would have issues getting pregnant. Had an HSG which showed 1 tube blocked, 1 partially blocked and my OB said if I tried for 6 more months with nothing, that I should go straight to IVF, IUI would have no help because my issued were because of the scar tissue.
When I consulted for IVF, they actually recommended I get essure placement (essentially getting my tubes tied) because a blocked tube with hydrosapalinx is actually toxic to embryo implantation... I got that done and started IVF, thinking and having the doctors telling me it should work right away because my issues were "physical" well... In all I did a total of 8! IVF transfers 3 fresh with 5 frozen in between and had 4 chemical pregnancies, 1 miscarriage at 7 weeks, and pretty much gave up on everything and felt like I had been through the ringer, when low and behold our last Fresh IVF try, I got pregnant and it stuck! My son is now 14 months old and the light of our life!
New studies are coming out that autoimmune diseases can increase your body's natural killer cells and basically interfere with implantation so I actually needed all kinds of additional interventions to help make the IVF "stick" Intralipids are actually given to help calm your immune system down, I was on steriods thoughout IVF to help with immunosuppression, and with my last successful cycle, I actually took shots of HCG (pregnancy hormone) to help my body think it was already pregnant and do what it was supposed to.
Good luck to you and I hope and pray your journey to motherhood is easier than mine was, but just know even if it seems difficult or even hopeless, try to make yourself stick it out because it is so worth it in the end!