If you are close to ovulation, EC may not be able to prevent pregnancy if you wait 5 days. Therefore, the best thing to do is take EC as soon as you can get it. A thorough and up-to-date academic review of the medical and social science literature on emergency contraception is available here .
Employer Identification Number - EIN. A unique identification number that is assigned to a business entity so that they can easily be identified by the Internal Revenue Service. The Employer Identification Number is commonly used by employers for the purpose of reporting taxes.
The Provider Federal Employment Identification Number (FEIN)/Social Security Number (SSN) is the unique identification number that the federal government requires all workers and agencies to have for tax purposes. For providers who do not have a FEIN, use their SSN. The Provider FEIN/SSN is used by CDE to determine the unduplicated number of providers (both centers and homes) serving children during a one-year period. This information is used by CDE when submitting the federal ACF-800 Annual Aggregate report.