Thanks for choosing health care magic for posting your query.
Yours wife diabetic state is not a very serious problem. the same can be taken care of by maintaining a proper diet, exercise and keeping the blood sugars under normal.A diabetic person can have a baby.
You need to get the USG done to assess for the presence of varicocele
. Take fresh fruits, do take time out for exercise.
Even if everything is normal then regular daily sex may take 3-4 months to conceive. In your case it may take a longer time (uncertain) but yes the conception is very much possible. If there is a problem you can try in vitro fertilization
Hope I am able to answer your concerns.
If you have any further query, I would be glad to help you.
In future if you wish to contact me directly, you can use the below mentioned link:
Wish you good health,
Dr. Srikanth Reddy M.D.