
Originally Posted by
ErectileTissue
Shrunken balls, known medically as "Testicular Atrophy", happens when your brain tells your balls to take a break. Your balls stop producing Testosterone and sperm, and they slowly wither and die.
Why does your brain tell your balls to take a break? Well... in your brain there are several sensors, and one particular sensor measures the concentration of androgenic compounds in your blood stream. When this sensor records a high value, your brain sends a message to your testicles telling them to shut down.
If you want a more scientific explanation: Your brains stops producing Luetinising Hormone, and when your balls don't get this hormone, they shut down.
The anabolic steroid Nandrolone (known by the tradname Deca-Durabolin) makes the androgen sensor in your brain record an extremely high value, meaning you get shut down particularly badly with this drug. Your balls start to shrink very quickly, and they shrink very small.
Testosterone, in similar doses, doesn't have nearly as bad an effect on your balls.
One thing you should realise, is that if you take Nandrolone on its own, your Testosterone level will plummet because your balls won't be producing Testosterone. You will suffer all sorts of bad symptoms, such as depression and impotence, if your Testosterone dips too low.