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Long standing varicocele
will have definitely some adverse effect on sperm production.
But we have seen people with varicocele were having babies.
Seminal analysis will reveal the present condition of your fertility status.
Varicocele can be corrected only by surgery. If left uncorrected further damage of you sperm producing tissues will be possible. So the surgical correction will prevent further damage.
Cyst over epididymis
is not a big issue.
If there is epididymitis
untreated for a long time it may lead to block of the vas deference, conducting duct of spermatozoa