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.
Personal exemptions U.S. tax filers are allowed to claim personal exemptions on their taxes. As long as no one else claims you as a dependent on his or her return, you can take one personal tax exemption for yourself on your own return.