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.
Best Answer: A TIN technically refers to ANY number that identifies a taxpayer to the IRS. For individual citizens, that is your SSN. For businesses, it is their EIN. The term TIN is usually used to refer to numbers assigned to individual taxpayers that are not eligible for a SSN.