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.
1 an Employer Identification Number (EIN), also known as a FEIN (Federal Employer Identification Number). 2  an Adoption Taxpayer Identification Number, used as a temporary number for a child for whom the adopting parents cannot obtain an SSN. 3  a Preparer Tax Identification Number, used by paid preparers of U.S. tax returns.