embryonic stem cells, for research. it's very similar to the abortion debate, to gather embryonic stem cells requires destroying a fertilised embryo
like 4-5 days in when it is basically just a bundle of about 150 stem cells.
a 'stem cell' is just a cell which can multiply to produce different kinds of other cells. embryonic are the most hectic, because they can produce
any kind of cell. adult stem cells are more specialised, for example bone marrow cells which produce red blood cells.
i don't know what the deal is with the umbilical cord business or storing stem cells. the whole thing is pretty bananas. i would check it out
thoroughly, to make sure the technology is actually legit and it's not just some pie in the sky thing based on possible future developments. even
then, i dunno.