I have to admit that my husband has always been reluctant to do IUI, (and we've done a total of 8
).
Mine has never liked the idea of course, but it turns out that he can be really supportive of my choices.
And perhaps he could see just how miserable infertility made me and he was really trying like mad to make me feel better, (although he does have his limits, and IUI is it. There will be no IVF for us, and that's ok).
I would say just what you said to us. That it's really important to you and that you feel you need to do more.
I would definitely take him to the doctor's appointment with you. You both will need to get all of the info straight and 2 sets of ears are better than one.
The doc can give you statistics on success as well. It's typically equivilent to a natural cycle; unless you do injectable/IUI, which will bump up your chances a bit.
I have done IUI at the ages of 24 and 34 for unexplained infertility. Both times, I was told 20% chance of success per cycle when we had been ttc for 1 year. Now that I am up to two years of ttc and 4 IUIs without a bfp, my success rate per cycle of IUI is only 5%.
The statistics certaintly aren't encouraging at all. And I can truthfully say that doing IUI with kids and their schedules is a nightmare..............but, as my husband says, "We gave it a college try." I can look back and say that I really truthfully tried for another baby and I was proactive, regardless of outcome.
You can tell your husband that it is much more affordable and much less invasive than IVF, that might help as well. Maybe tug on his heart strings about how the kids are only getting older, the age gap is getting wider, etc. If you really want to pull out the big guns.......maybe ask him about it right after sex when he is all happy and relaxed and ready to give you the world.
Good luck.