A RhoGAM shot is a simple way to prevent complications with your Rh positive baby if you're pregnant and have Rh negative blood. We'll tell you what it does and what to expect.

Hematology: Vaccinating the Rh-Negative 2 minute read TIME June 21, 1968 12:00 AM GMT-4 ...

The mysterious Rh factor-in human blood had disturbed the serenity of many a mother-to-be. For if a wife's blood were Rh negative and a husband's Rh positive, their child might be stillborn, ...

The problem only arises when your baby is RH-positive, and you are RH-negative. It is called RH incompatibility, and it can easily cause complications that will affect you and your baby.

Clinics that serve autistic children report 62 percent of their patients were born to RH negative moms who received RhoGam. I wish more reporters would cover this.

When I had my children in the ‘60s, I was in the original study conducted to see if my AB negative blood type would hurt my children. I understand that the Rh factor can hurt unborn babies.

When I had my children in the ’60s, I was in the original study conducted to see if my AB negative blood type would hurt my children. I understand that the Rh factor can hurt unborn babies.

S. Shanmugam, 54, who has Rh-negative blood, said he has donated blood 54 times and was the largest donor of this rare blood type to the Raja Permaisuri Bainun Hospital (HRPB) for the past 33 years.