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.
There are two types of exemptions: personal exemptions and dependency exemptions. You can claim a personal exemption for yourself, and another personal exemption for your spouse if you file your taxes using the married filing jointly status. You can claim one exemption for each of your dependents. Your spouse is never your dependent, according to the IRS.