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.
If another taxpayer is entitled to claim you as a dependent, you cannot take an exemption for yourself even if the other taxpayer does not actually claim you as a dependent. Source(s): IRS Publication 17, Chapter 3 (Personal Exemptions and Dependents), Exemptions.