We do use human embryonic cells in our research in order to discover life-saving treatments for serious long-term diseases. The use of human embryonic stem cells raises ethical issues because the cells come from a fertilised human egg. Some consider it unethical to work with human embryonic stem cells in a lab.
We make our decisions based on balancing the benefits to patients and society and adherence to our values and ethical codes. Importantly, we only use stem cells that come from eggs that would not otherwise be used and have been donated by people after giving their informed consent. Once the stem cells have been extracted from the fertilised egg, these cells are kept in the lab and can be used to create new cells. This could possibly serve as an unlimited cell source.