They have found that fat cells from liposuction are a very good source for stem cells (Wanted 214). These stem cells are a very good source because liposuction is the most popular form of cosmetic surgery, so researchers will never run out of cells for research (Wanted 215). In addition to liposuction researchers have found out that "bone marrow cells contain at least two types of stem cells that have the ability to develop into various other types of cells such as muscle, bone, liver and -as it now appears- brain cells (Bone 93)". Eye surgeons using cornea tissue that was grown in a lab to restore vision in sixteen patients who were thought to have untreatable eye damage (Bioengineered 57). .
"Many people that a blastocyst is a tiny cluster of cells lacking thought or feeling. They also say that any rights of a blastocyst must not take precedent over the needs of people who are already alive (Update 333)". Some of these people are very intelligent and educated scientists. Harold Varmus, a former director of the National Institutes of Health (NIH) said that stem cell research "has the potential to revolutionize the practice of medicine (qted in Update 330). His beliefs are similar to NIH's beliefs today, which agreed to bypass the government's restrictions by funding research (Update 330). Another scientist who believes this way is Irv Weissman who is a biologist at Stanford University who said "anyone who would ban research on embryonic stem cells will be responsible for the harm done to real, alive, postnatal, sentient human beings who might be helped by this research, opponents are sacrificing these people to keep from destroying embryos in fertility clinic freezers (qted in Begley 24)". .
While some people believe this way other people believe the exact opposite. These people believe that the embryos have the right to live (Update 329). Most of these people are pro-life on the issue of abortion as well (Update 331).