Hello sir, having one normal functioning testicle is enough for fertility. But to enhance the fertility ayurvedic medicines can help. Take food items rich with vitamin C. vitamin D and zinc. Start taking hot milk twice a day also two to three dates in the morning and in the night with milk. Avoid junk food, oily and more spicy food, alcohol, tobacco, tension and anxiety. Start doing brisk walk or running or cardio exercises for at least 1 hour a day. I am suggesting u some ayurvedic medicines. Take dhatu paushtika churan one teaspoon in the morning & in the night. Take tablet shukar matrika bati one in the morning and one in the night. Take tablet Brihat Bangeshwar ras one in the morning one and one in the night after food. All three preferably with milk or with water. Do all the above suggested treatment for 4 months and see the results. If you don't get satisfactory results then please go to your family doctor or a good sexologist or urologist. You can also contact me on my private chat or directly on my clinic numbers. We can send you the medicines by courier. My website: www.kayakalpinternational.com