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.
Search Federal Employer Identification Number (FEIN) to obtain the unique nine-digit FEIN or Federal Tax ID Number issued to each business by the Internal Revenue Service (IRS). Use the Federal Employer Identification Number search to locate businesses, their addresses, and to obtain their FEIN for required tax filings.