As Sonisonix has said perhaps you could get some tests such as Natural Killer Cells test, Thrombotic risk profile, vitamin D etc, Emma/alice and they could treat you with steroids, probiotics, aspirin or other blood thinner/low dose heparin, intra-lipid infusions and high dose of e-methylfolate instead of the other folic acid in case you have problems absorbing the normal version of it etc during pregnancy to prevent recurrent miscarriage. I would try that first before moving on to donor embryos if you haven't taken these treatments already. Sorry if you have already tried all of these. Perhaps speaking to a fertility immunologist might help. I think Dr Beer's book recommends certain further immune treatments that can be done.
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