Hi there, no worries about the questions.
We'd never had a definitive diagnosis of why we weren't getting pregnant - one of my tubes is a bit ropey but the other is perfect, cycles can be a bit irregular but progesterone results generally showed ovulation...so it might have taken a bit longer but no reason why it just couldn't happen. But as the SAs done on the NHS (and privately after the vas reversal) all came back normal, we presumed it was me. We did actually get pregnant earlier this year on our first IUI cycle, but sadly I miscarried around 8 weeks. For various reasons we then had to go private and our clinic said they routinely do antibody testing, but that they always expect to find them after a reversal op. when the results came back it was a bit of a relief to possibly have a reason why it wasn't happening.
What's interesting though, considering what you've been told, is that our consultant said he was a bit surprised we'd conceived via IUI with the antibody test results we'd had. As I understand, the antibodies basically make the sperm 'clump' together which stops them doing what they ought. I'd wanted to try IUI again before proceeding to IVF but was persuaded that the antibodies meant our chances wouldn't be great. I don't really understand how, if the antibodies make the sperm clump, a normal SA doesn't show it. When we had the IUI though, I remember the nurse saying she'd had to basicially really shake the sample about as it was clumpy but we didn't really know what that meant and she didn't expand. As we then did get pg, we didn't think of it again till we saw the private clinic and he immediately said it would most likely be antibodies. Sorry, that's a really long-winded way of saying our consultant would completely disagree with yours in saying it shouldn't affect natural conception - he would say you can't with high proportion of antibodies.
Can you try another clinic, even if just to get the antibody test done? And I don't know whether it matters what is causing them? I understand that it's often a result of trauma to the testicles (hence common after vas reversal, apparently also frequently seen in rugby players too) but not sure if there are other medical reasons and if so, whether that can be treated.
We are going to try again in feb/mar and just hope we really were unlucky this time, rather than anything else. Lots of luck to you - let me know what happens from here x