You don’t have to answer this if it’s too personal, but have you two never been able to have sex at all or is it just few and far between because of his performance anxiety?

I have to wonder what they are doing in his therapy sessions. There are cognitive behavioral techniques that can be done that might help a lot, but that knowledge is going to depend on what kind of therapist he is seeing. Does he go there just to talk to them about what’s going on or do they have him working on different techniques to try to get over his anxiety around it? Do you know if he has any idea where/when the anxiety started? If it was caused by any certain event?

The next thing is how old are both of you? If you can and if the clock isn’t ticking too fast, per se, I would probably hold off on treatments for now, if it were me. This is something he really should hopefully be able to work through either way (provided he is seeing a good cognitive-behavioral psychotherapist) and IVF treatments are very, very expensive.