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.
Who is Eligible. An individual can claim one personal exemption for oneself plus one exemption for each person claim as a dependent. Married people who file jointly can claim two personal exemptions (one for each spouse), plus exemptions for each of their dependents.