Thank you very much for your reply, Andy. I've seen that same article you referenced already, and though it only gives evidence for a hypercoagulation problem in Major and Intermedia, it's what really made me wonder about a possible link for Minors also.
I actually started wondering about a connection between the Thalassemia trait and miscarriage almost four years ago when I lost my first pregnancy. At that time, my obstetrician said there was no reason to believe they were related, and a general Internet search of "Thalassemia and miscarriage" didn't produce any relevant information.
Now that I've suffered four losses, we have reason to believe that my complications are related more specifically to a blood clotting issue, so of course I immediately wondered whether there might be a connection to my Thalassemia carrier state. A more specific Internet search of "Thalassemia and hypercoagulable state" yielded some interesting hits, especially the article you referenced.
I'm still awaiting my results from the thrombophilia testing, but I will be sure to bring the possible Thalassemia link up with my perinatologist (high-risk pregnancy specialist), and may try to get in touch with a hematologist as well. Whether they find I have a specific blood clotting mutation or not, my doctors want me to take anti-coagulants during my next pregnancy as a precautionary measure.
I'll update here if anything interesting comes of it, and I'd still love to hear from others who might have any experience with this.