What are the cons about stem cell research?

The main issue concerning stem cell research that pro- lifers are against, are the moral and ethical stand- point of embryonic stem cell research. This type of research includes the destruction of blastocysts formed by laboratory- fertilized human eggs. Since these pro- lifers believe in the idea of conception, this type of research of destroying blastocysts is immoral and unacceptable. The long- term effects of stem cell are still unknown which can also hold a burden on patients.

1) "Pros and Cons of Stem Cell Research." About.com Biotech / Biomedical. Web. 14 Mar. 2012. .