Can a man go from infertile to fertile?

Related questions

1. What are the epididymis?
2. Can a man with zero sperm count get a woman pregnant?
3. Can epididymitis cure itself?
4. Can sperm get clogged up?
5. How do sperm ducts get blocked?
6. Where are the seminal vesicles located?
7. What is the definition of ejaculatory duct?
8. Can a guy pee when he's hard?
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Tags

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2. #exceptions
3. #counts
4. #thing
5. #surprisingly
6. #still
7. #condition
8. #absence
9. #abnormal
10. #common
11. #infertile
12. #semen
13. #normal
14. #plenty
15. #known
16. #azoospermia
17. #sperm
18. #complete
19. #about