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As per your history it is evident that your wife is suffering from premature ovarian failure
along with endometriosis
. With increasing age, quantity and quality of eggs deteriorate. Endometriosis is additional factor leading to infertility
which also leads to of poor quality eggs. At present IVF with donor eggs will give you best chance of success. There are many treatments available said to improve egg quality but nothing has been proved. I dont think any of these treatment will give any benefit in your case. For time being before you decide for IVF with donor eggs, she can be put on DHEA tablets for 3 months and hope for improvement.
All the best.