Hi Jo
Frustrating how something we all take for granted can turn on its head. I grew up just expecting I'd have a family, and when I got married I thought it was a done deal. After all, having kids is part of life's "package". I know you must be feeling very worried about the road ahead

I also went through SIVF, though in my situation I used PGD to bypass most likely age-related chromosonal issues. I check the SIVF website and they do indeed advertise they have developed tests for haemophilia A and haemophilia B.
The great news is, you are not seeking IVF for infertility problems. At your age you most likely still have an abundance of eggs, which is a great start for PGD

Also, PGD has a high success rate after transfer - comparatively above that of standard IVF. This is partly because some people who do PGD do not have infertility issues, such as implantation problems.
In my experience, SIVF were excellent - they really know this stuff inside-out. It all started with a phone call. I spoke to a PGD nurse co-ordinator who answered my myriad questions (some clever, some not so clever). She explained the whole process to me. Generally, you get a referral from your GP to a SIVF Fertility Specialist. I then made appointments with the Kent St Clinic where I met with a SIVF PGD nurse co-ordinator, a counciller and PGD scientist. During the latter meeting I quizzed the PGD scientist about success rates and they emailed me the most up-to-date figures (more current and more detail than those posted on the SIVF website).
I will be honest and say I did find the IVF process very stressful and it did not work for me first-time. But the potential reward obviously outweighs it all.
I wish you all the best, Jo. Hope this has been of help to you.
WTH