Fertility work up

Me and SO have been married for more than 3 yrs, been working on conceiving but still unlucky. We are always away from each other though coz he works overseas. We see each other twice or 3x a yr, and only for like 2 months. I have been really really wanting us to have IVF since i think it's the fastest way to get pregnant. But SO is not into it. He always dismiss the topic when i open it up. It really makes me frustrated! I mean, why wont he consider going to a fertility clinic and we'll have IVF? He also wants to have a baby but going to the clinic just doesn't interest him..