The Vatican has issued new ethical guidelines permitting Catholics to receive transplants of animal tissues, including organs from genetically modified pigs or cows, to treat medical conditions. The 88-page document, released by the Vatican's doctrine office, reaffirms that Catholic theology does not object to such procedures, provided they follow best medical practices and avoid animal cruelty.
The guidance explicitly states: 'Catholic theology does not have preclusions, on a religious or ritual basis, in using any animal as a source of organs, tissues or cells for transplantation to human beings.' The document addresses xenotransplantation, which involves transplanting organs or tissues from one species to another. The Vatican first approved such procedures in 2001, when they were in early development stages.
Animal organ transplants for humans remain rare. The first pig-to-human kidney transplant was performed in the United States in 2024. The Vatican document, drafted with input from doctors in Italy, the U.S., and the Netherlands, calls on scientists to pursue animal transplants in a manner that is 'purposeful, proportionate and sustainable.' It also urges doctors to disclose risks, including immune rejection and potential infections from microorganisms.
In a separate 2024 declaration, the Vatican condemned sex change operations as 'grave threats' to human dignity, equating them with abortion and euthanasia. The 20-page document, approved by Pope Francis, distinguishes between transitioning surgeries, which it rejects, and 'genital abnormalities' present at birth or developing later, which can be 'resolved' with medical help.
