If you’ve been sensitized by a previous pregnancy or blood exposure, trying to conceive again
can come with extra layers of planning and concern. For families affected by maternal
alloimmunization, certain fertility paths can help reduce the risk of Hemolytic Disease of the
Fetus and Newborn (HDFN) in future pregnancies.

You have options.

Some alternatives to natural conception include:

• Sperm Donor (Antigen-Negative Match): If your partner carries the antigen that triggered
  sensitization (like the K, D, or c antigen), using donor sperm from an antigen-negative
  individual can eliminate the risk of your baby inheriting that antigen and prevent HDFN
  entirely.
• In Vitro Fertilization (IVF) with Preimplantation Genetic Testing (PGT): IVF allows
  embryos to be screened before transfer. If your partner’s antigen status is heterozygous
  (one positive gene, one negative), PGT can help select an embryo that is
  antigen-negative, greatly reducing the chance of disease.
• Embryo Donation: In cases where both partners carry concerning antigens or where
  PGT isn’t feasible, some families consider using donated embryos that are not at risk for
  HDFN.
• Surrogacy (Gestational Carrier): For some families, especially those who’ve experienced
  traumatic losses or medical complications working with a gestational carrier may be the
  safest path forward.

No two paths to parenthood look the same, and making these decisions can feel overwhelming.
If you’re navigating this terrain, our community is here to walk alongside you offering support,
connection, and resources.

Please remember: with the right care team, HDFN is short-term and treatable. Many families do
conceive naturally and go on to have healthy pregnancies and good outcomes.

Have questions or want to speak with another family who’s been there? Contact us anytime at
contact@alloimmunization.org.