Your wife has a potency for her children’s house with 54.56% while you have a potency of 40.04% (your net residential strength of planets is 38.70% while that of your wife is around 56%), the strengths of which are capable of giving you happiness from children. You are only running 33 and there is lot of time for possible fertility. I would suggest you to have one more medical test and continue with treatment. There is certainly a possibility of parenthood for both of you latest by 2017/2018 after which I do not think there is any hope. To my mind, if there is a problem it is with you and not your wife. Investigate further with medical treatment preferably with Homeopathy and have a last go at it. I am sure you will succeed. Recite Narayanakavacham (both of you) at least 3 times a day and I am sure God will bless you both.