View full size image. How long a healthy pregnancy lasts can vary by as much as five weeks, even when doctors precisely determined the date of conception, a new study suggests.
Exemptions for dependents. You can usually claim an exemption for each of your dependents. A dependent is either your child or a relative who meets a set of tests. You can't claim your spouse as a dependent. You must list the Social Security number of each dependent you claim on your tax return.
Taxpayers may not claim a person as a dependent unless the person is a U.S. citizen, U.S. resident alien, U.S. national or a resident of Mexico or Canada. If the taxpayer can claim an exemption for a dependent and fails to make the claim, the dependent still cannot claim an exemption for himself on his tax return. Taxpayers cannot claim exemptions for maids, servants or housekeepers who work for the person filing the income tax return.