There are many reasons you might miss a period. Simple things such as stress or exercising too much can cause a missed period and many girls are irregular during the first few years of menstruating. But if you've missed a few periods, be sure to see your healthcare provider.
Courts usually find probable cause when there is a reasonable basis for believing that a crime may have been committed (for an arrest) or when evidence of the crime is present in the place to be searched (for a search).
Probable Cause. Probable cause generally refers to the requirement in criminal law that police have adequate reason to arrest someone, conduct a search, or seize property relating to an alleged crime. Police must also have probable cause to arrest without a warrant, and in many cases to search or seize property without a warrant.