Should I be mad?

So we have been trying to conceive for a year with no luck. As I am over 30 I went to get the blood tests back in September just to check everything was ok, they said my partner should also go get the various checks done. I've been asking him ever since. He still hasn't been. It feels like he's just not bothered. He has children from a previous relationship but we've been together 8 years. He says it not him with the problem as he has proven he can have children. I'm at the point of giving up as it feels like it's only me that wants this. I feel like I'm over reacting but it's only a test to make sure? I just don't get why he wouldn't go when it means so much.