From an objective point of view, abortion could be considered a good thing in that blastocysts (pre-fetal zygotes) can be and are used in stem cell and genetic research, as well as cloning. These blastocysts are sometimes retrieved from abortions, with consent, and used for research and development in the previously stated areas. Without resources like this, much of the research into stem cells would be a lot harder to achieve. The cells within a blastocyst are all stem cells and (if allowed to develop in the womb) would therefore eventually differentiate into specialized cells (liver, heart, skin etc.). This direct sourcing is clearly advantageous and much more efficient in regards to research purposes.