There are two primary types of stem cells. One type, embryonic, uses the cells from an early human embryo to create new, specialized types of cells. Embryonic stem cells are used for cell based therapies because they can develop into over 220 cell types found in adult, they have the capacity to reproduce in large numbers. They are capable of almost unlimited cell divisions when placed in culture. This makes them extremely versatile. Using stem cells to gain knowledge of how these cells differentiate, grow, and renew will provide breakthrough results in the study and cure of cancers, diabetes, birth defects, spinal cord injuries, and other diseases caused by dysfunctional cell replication. Embryonic stem cell research can improve drug safety, as a drug can be tested on a group of stem cells before being used on a patient. The embryonic stem cells are extracted from the inner cell mass during the early phase of blastocyst during embryonic development. After an egg is fertilized, generally during in vitro in a laboratory setting, it starts dividing. The blastocyst is a hollow ball of about 150 cells. The inner cell mass are the cells located in the inner part of the ball, once extracted, the embryo is no longer viable or living . Hence, the arising controversy surrounding the destruction of the…