Hi, I posted on the other thread, but just wanted to post some encouragement to you here too! The AMH test does only indicate egg quantity NOT quality.
There are several links to good positive stories of women with low AMH levels having their own babies naturally or with IVF, here is just one example,
In terms of the link with miscarriage, after I read your post I googled (ok not the best type of research!!!), but I only really found one link to some research in New Zealand and even that looked like it was of dubious academic basis!
The most helpful link I found was in relation to the levels, it is difficult reading research when there are different units of measurement used, this link with drmalpani gives both units of measurement and interpretation.
Also in terms of your question regarding not responding to IVF, this link to ivf1 dot com is good at explaining and to quote from it "Several factors lead scientists to believe that AMH might be a good marker for ovarian reserve. For example, AMH, like ovarian reserve, decreases with age. Some studies in IVF patients have shown lower AMH levels in women who responded poorly to fertility drugs." and "correlation was found between the number of eggs retrieved and the AMH level. Those women with low AMH levels tended to get fewer eggs during IVF than women with high AMH levels. Pregnancy rates were also lower in those women with low AMH levels."
The fact that you have become pregnant twice in the last two years I would have thought counted as a positive sign. I would be interested in knowing where the doctor got the statistic of 75% chance of miscarriage. I am nearly 43 and had recurrent miscarriages and have been told that there is still a reasonable chance that I could have another successful pregnancy. (that was before I got my amh test done too).
So I just want to encourage you to not take on the negativity of this particular doctor you have seen. He is clearly pushing for you to take the donor egg option, but that is for you to decided not him. Also remember there are plenty of women out there who have concieved naturally during peri-menopause with very very low AMH levels and had perfectly ok babies. Unusual but not impossible.