Forgery describes the process of making fake documents or other objects.
This usage derives from the term "forgery[?]", describing work done by a metalworker at a forge.
Forgery is one of the threats that have to be addressed by security engineering.
... for sperm.
The external urethral sphincter is the skeletal muscle that allows voluntary control over urination.
In the human female, the urethra is about 1-1.5 ...