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.
Most of us know you can claim a dependent exemption for your children on your tax returns, but many people forget they might be able to claim exemptions for other loved ones including elderly parents, other relatives and even a boyfriend or girlfriend they have been supporting.