Okay I'll straighten this up as well revive an old thread.
There are two types of stem cells. Adult stem cells and embryonic stem cells. Adult stem cells are found in the bone marrow on humans and are used to make Red and White Blood Cells, they can be used for some other things but they have genetic code inside of them, therefore they are semi-stem cells if you would.
Embryonic stem cells on the other hand are like a clean slate, these cells can differentiate into whatever they are needed to be, thats why they are so valuable and useful to the medical field.
I support Stem Cell Research 100%. This is why: there are so many stem cells available that will never be used. This is the case becuase this is what happens.
Lets say a couple wants to have a baby but they cannot, they must use invitro fertilization. So they goto a doctor, the doctor gets the male's sperm and the female's eggs. Then they indroduce the sperm and eggs together in a pteri dish, eventually you end up with lets say 30 zygotes(fertilized eggs). Then the docotor takes about 5 zygotes and implants them into the female's uterus and hooray they have a baby. The remaining 25 zygotes are stored and frozen just in case the couple wants to have another baby. Lets say the couple does want to have another baby, so the doctor gets the zygotes, implants another 5 into the female and hooray! another baby. This leaves us with 20 zygotes or embryos if you would. The couple then decides that they do not want to have anymore children. So that is 20 embryos which can be used to work with stem cells quite easily. But this form of invitro fertilization occurs many times every year in the US alone, leaving us with millions of embryos that could be used in stem cells research. MILLIONS of embryos that nobody wants, they will just be thrown out, why not use them for steam cell research?
Also the embryo will feel no pain or anything, as long as it does not pass the first trimester of pregnacy, its fine by me. For viable stem cells to be created the zygote or embryo does not have to mature for very long.
In my mind, its a no-brainer, the embryos are there, why not use them? Nobody else will.