<P> Mouse embryonic stem cells with fluorescent marker </P> <Li> <P> Human embryonic stem cell colony on mouse embryonic fibroblast feeder layer </P> </Li> <P> Human embryonic stem cell colony on mouse embryonic fibroblast feeder layer </P> <P> The primitive stem cells located in the organs of fetuses are referred to as fetal stem cells . There are two types of fetal stem cells: </P>

Where are stem cells produced in the body