What is Alloimmunization? What is 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 her 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.
AHF In Action
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The Allo Podcast
Step inside the often overlooked world of maternal red blood cell alloimmunization and hemolytic disease of the fetus and newborn (HDFN) where real families, frontline clinicians, and lifesaving research intersect.
Each episode of The Allo Podcast brings you powerful patient stories, expert perspectives, and valuable insights for providers and care teams. Whether you’re a parent navigating a high-risk pregnancy or a provider caring for alloimmunized families, we break down complex information into language you can actually use.
Our goal is to educate, empower, and equip you to advocate for the best possible care, while building community, sharing hope, and yes… having a lot of fun along the way.
Empowering Patients to Advocate for the Right Care
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Patient Stories
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Get Involved
There are plenty of ways to get involved with The Allo Hope Foundation including sharing your story, participating in research, donations and more.
Blooddrive Tool Kit
Hosting a blood drive takes a little bit of work to make a lasting impact. Get information on how to get started.
Share Your Story
You can help other families dealing with alloimmunization and HDFN by sharing your story.
Participate in Research
Large scale studies on alloimmunized pregnancies are few and far between. Your help makes progress possible.