If both parents are Rh-positive but carry one Rh-negative allele, there's a 25% chance they could have an Rh-negative child.

Ounce of Prevention is a weekly column which presents recommendations for preventative services derived from The United States Preventive Services Task Force (USPSTF).

meaning their blood can be given to anyone regardless of their blood type. People with AB-positive blood are universal recipients, meaning they can receive blood of any type. The other blood types ...