Home

What is Alloimmunization / HDFN?

Maternal alloimmunization occurs when a woman makes red blood cell antibodies after being exposed to a blood type that is different from her own. These antibodies can cross the placenta and attack the unborn child, a disease called Hemolytic Disease of the Fetus and Newborn (HDFN). HDFN can have devastating consequences including anemia, hyperbilirubinemia, and death. With close monitoring and timely treatment, babies with HDFN have a very high survival rate.

Be an advocate for yourself your patients and your community by learning about this complex disease.

Terms & Definitions

Learn the terms and language used when dealing with maternal alloimmunization and HDFN

History of HDFN

Learn about the history of Alloimmunization & treatment options.

Letter to Providers

This letter provides crucial information and resources for both patients and practitioners.

Prenatal Flow Chart

An interactive guide through the proper course of prenatal care for alloimmunized patients.

Printed Booklets

Download these booklets describing HDFN complications, monitoring and treatment options before and after birth.

Patient Stories

Journey with our families as they go through pregnancy dealing with Alloimmunization & HDFN.

Pregnancy by Week

Get essential information for various gestation periods including awareness and silver lining for the stages of pregnancy.

Calculators & Tools

Get information, links, calculators, and charts that you may need to monitor your baby.

Support Resources

A wide array of support and help resources for both patients and providers

Advocacy

Find a Doctor

The Providers Checklist

Letter to Providers

Medical Alert Cards

The Allo Podcast

The Allo Podcast brings you into the complex world of maternal red blood cell alloimmunization and Hemolytic Disease of the Fetus and Newborn (HDFN.) We share real life patient experiences, valuable insights for providers and care teams, and easy to understand monitoring and treatment information. We empower you to advocate for the best possible care, and we have a great time doing it.

Find Support

Join Our Support Group
Read patient stories
Grief & Loss Resources
Natural Conception Alternatives
and more…

Frequently Asked Questions

The journey can be scary, and we know you have questions. We’re here to help guide you with educational materials and plenty of resources. Check out our frequenly asked questions for more helpful information.