Rh Incompatibility

Rh Factor

If you're not sure what your Rh factor is and think you're pregnant, it's important to start regular prenatal care as soon as possible — including blood-type testing. Your Rh factor may play a role in your baby's health, so it's important to know this information early in your pregnancy.

Review Date: Monday, August 13, 2012

American Academy of Family Physicians

Rh Incompatibility

Be sure to have a blood-type test to determine your Rh factor when you become pregnant. This article explains why.

Review Date: Wednesday, February 22, 2012

The Nemours Foundation

The RH Factor: How It Can Affect Your Pregnancy- (PDF)

This article provides a brief overview of RH Immunoglobulin (RhIg), and its role in preventing anemia and more serious problems in the babies of RH-negative mothers.

Review Date: Thursday, December 18, 2014

American Congress of Obstetricians and Gynecologists

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