Try to grow a plate with nothing on it. If something grows, it's not sterile.
Sterility can be confirmed by observing the media for absence of microbial growth after incubation, checking for turbidity or cloudiness in the media, and ensuring there is no foul smell. Additionally, using aseptic techniques during media preparation and handling can help ensure sterility. A positive control can also be included to verify that the media is capable of supporting microbial growth.
see a urologist and have his sperm tested
Wait until you try to have a baby and he'll tell you then, or even before that if he trusts you.
Actually there are no symptoms. It will be better if you visit a doctor.
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They don't.
you should go to a fertility doctor or an obstetrician to ask for a fertility test.
you tell me?
u tell me
normative theories are those theories which tell a way how should media govern.
you can tell people not liter and tell people to ride their bikes and get some exercise.
there is no way to tell but exercise and diet do count for a longer life