I’ll tell you what my GP said: we were going private (already had a child so no nhs treatment) and she advised to go to a clinic that also does NHS work. She reckoned they’d be up to date with the latest research.
We went to CRGH (before I knew my AMH was low as they didn’t / didn’t test for that on the NHS) and we were happy with them. I was told that while ARGC have high success rates they are very selective about who they accept for treatment (thus the high success rates) and also the treatment regime is very time intensive and difficult to combine with work. Treatment at CRGH was incredibly time consuming as it was so if what I was told about ARGC was true I can’t imagine how much more time I’d have had to spend in the clinic.
To counteract the advice above, we did have 3 rounds of natural ivf (no stimulating drugs, just the trigger shot to collect the one egg my body produced naturally - on the basis that with low ovarian reserve this was likely to be the best quality egg anyway). We were told that the chances of a single cycle succeeding were low and that did turn out to be the case - embryo quality was worse and worse each cycle and the 3rd cycle didn’t even get to embryo transfer. I was devastated at the time and I don’t like to think about the money we spent but I felt we’d truly tried our best with my eggs and I was able to move on knowing that emotionally (not to say financially) I wasn’t prepared to keep rolling a dice when we were so unlikely to ‘win’.
That’s the point where we weighed up whether to stop treatment or consider donor eggs. We decided to try donor eggs and we were successful first cycle. We were advised to transfer one embryo to reduce the likelihood of multiple birth and were happy to agree (the embryo quality was very good and I didn’t want to risk twins).
I was happy with CRGH - they got us our much wanted baby after all. Waiting times were often long though, although this may have improved as they have moved since we had treatment. I felt like the doctors and staff cared about me. I do think they pushed some experimental (and costly) treatment add-ons (eg endometrial scratch, steroid treatment) but they were also honest about the evidence base.
Good luck finding the right clinic for you.