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. reasonable belief, based on fact, that a crime has been committed and that the person, place, or object to be searched and/or siezed is linked to the crime with a reasonable degree of certainty; comes from firsthand knowledge; informants; tips anonymous and telephone. Particularity.