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.
Dependent not allowed a personal exemption. If you can claim an exemption for your dependent, the dependent cannot claim his or her own personal exemption on his or her own tax return. This is true even if you do not claim the dependent's exemption on your return.