@jaspercats
Sorry you find yourself in this situation.
While any form of infertility is obviously a stressful situation that brings on anxiety regardless of the cause. From what I understand, male fertility issues are often easier to manage (theoretically) than female. I have stumbled across some mumsnet posts of very unfortunate women who are told 'unexplained infertility' and years down the line are no further forward in TTC, as there is no clear cut solution - whereas with men, though it may take a while, and you might have to fight to get the support and go through unpleasant and invasive treatment, there often is a solution.
Anyone please feel free to correct me in any of this, I am not an expert, this is just what I have pieced together through several weeks of research on the subject.
From what I understand, there are 4 causes of azoospermia, obstructive, non-obstructive and anatomical abnormalities such as being born without a van deferens. or some genetic causes.
If they do a blood test, while this is not a definite diagnosis, it can point the direction of whether it is obstructive or non-obstructive. For obstructive, hormonal blood results will be normal, for non-obstructive, they will be deranged.
For the other two, the investigations will be checking for chromosomal abnormalities, or a physical examination.
For obstructive azoospermia, there are surgeries to un-block, but some men opt not to do this and go for surgical sperm retreival
In most cases of azoospermia there are surgeries to retrieve sperm. There are a few types of this, if the nature of azoospermia is sperm production, then this surgery is more challenging as they have to search for little pockets where they hope they can find sperm being produce. For blockages, the ease and success rates are higher in finding viable sperm.
For sperm production issues before they consider a surgical sperm retreival, they will likely prescribe medication that aims to improve sperm production.
At this point, your husband needs to be referred to andrology, and you (has to be in womans name) need to get the fertility treatment funding underway as it is likely you'll need ISCI (a form of IVF where they select a singular sperm and place it into the egg to fertilise)
Unless you are absolutely swimming in cash, I would go for NHS treatment. It changes area to area, but most couples are entitled to three rounds. We considered private as we are inpatient. But I had a look at some statistics, and the success rate is higher within 6 rounds, than it is for 3, so I have considered that regardless of going NHS first, there is a possibility that I will need to pay for private treatment too. And you can't go back to NHS once you've had three rounds done privately.
I obviously don't know your area, but waiting lists where I am are not as horrific as I was anticipating, (3-6 months), still much longer than I am happy with, but I suppose for the sake of spending 10k or whatever it would be, it is best to get the free ones out of the way.
You can also ring around the clinics too to find the ones with the least waiting time, that's what I'm doing.
My advice for now, is to consider the first things the andrologist may ask, such as whether he is taking supplements, what his diet is like, does he drink, smoke etc? As this can be used as a big delaying tactic, that the doctor will highlight lifestyle changes that need to be made, and then say "try cutting back on alcohol, eating healthier, take these supplements for 3 months then come back and see if it helps" - So have that stuff underway prior.