Question

Where do stem cells come from that doctors use in stem cell research?

Answer 1

Answer: Embryos.

Step-by-step explanation:

The embryonic stem cells used in research today come from unused embryos. These result from an in vitro fertilization procedure. They are donated to science. These embryonic stem cells are pluripotent.

Answer 2

Step-by-step explanation:

The embryos being used in embryonic stem cell research come from eggs that were fertilized at in vitro fertilization clinics but never implanted in a woman's uterus. The stem cells are donated with informed consent from donor