Hello Imzadi - I sympathise with you and your partners situation, as I know, that although I and my wife have been blessed with children, there are people close to me who are not, and I see first hand what it is like for them.
There are two issues here. First there is the ongoing quest for a medically assisted solution, but I'm sure you have both explored this, however, it is an ongoing quest.
Secondly, your wifes' faith may enable her to see her situation as a challenge to her faith, where, denied for the moment, the opportunity of motherhood, she can ask for the grace to strengthen her in this ordeal, and know, that whatever her situation, she is in Gods will, and can know the peace of mind that comes with this realisation.
Honestly, these are not weasel words from some religious nutter, out of touch with reality. I know God can give us the grace to face up to any situation. (continued)