While everyone’s blood contains the same basic parts, there are eight different blood types. The type you have depends on genes you inherit from your biological parents. What makes your blood ...

This video is provided for educational purposes only. Always talk to your health care specialist about your unique medical needs. Tetralogy of Fallot occurs when a baby’s heart does not form correctly ...

A step-by-step guide to help you fill out a W-4 Thanasis / Getty Images You're about to begin that much-needed, new job and your employer hands you an IRS Form W-4 to fill out and submit to them ...