You ask whether stem cell therapy is acceptable in Bahá'í law. As you are no doubt aware, this new area of scientific inquiry involves a distinction between embryonic and other aspects of stem cell research. Reports appearing in the press and in scientific literature indicate that such exploration is at an early stage. Many fundamental questions about the biological and genetic features of the processes involved, and the physiological implications, remain unresolved, and will become clear only with the passage of time.
Nothing specific has been found in the Bahá'í Writings regarding stem cell research and the types of therapy to which it may apply. The House of Justice regards it as premature for it to give consideration to these matters and their spiritual consequences. For the present, believers faced with questions about them are free to come to their own conclusions based on their knowledge of the Baha' i teachings on the nature and purpose of life. However, they should be careful not to make dogmatic statements or to offer their own understanding as a teaching of the Faith.
- The Universal House of Justice (From a letter dated 23 August 2001, written on behalf of the Universal House of Justice to an individual believer; Baha’i Library Online)