This is something I am re-hashing from another website, because there seems to be a highly intelligent and rather diverse community here, and I am interested in input. Original post is at this link.
Response to the statement: Abortion has factors which are too diverse to not be a choice.
The debate over abortion has many facets that seem to complicate the issue beyond the ability for anyone except the individual effected to be able to make the decision. Both sides make arguments from morality, use well established science to justify their positions, and make strong but fundamentally contradictory philosophical arguments for or against it's legality.
However, and the main point that I think will change your mind, is that both of these positions, ( pro-life and pro-choice ) ignore the actual issue, which is undesired pregnancy. This debate is about damage control, and therefore the way it is handled should be secondary to preventing the unwanted pregnancy in the first place.
For women, there are countless methods available to counteract or prevent pregnancy, however with the exception of abstinence none of these methods are not 100% effective. This results in hundreds of thousands of unwanted pregnancies per year. For men, only true 3 methods of birth control are available ( celibacy, condoms, and vasectomy ) There is no equivalent birth control method available for men due to the difficulties in manufacturing such a drug, however many drug companies are actively trying to develop such a method.
You might think about each method of birth control as another filter that reduces the number of pregnancies at each level. For example, if birth control is 99% effective then adding another layer that is 99% effective will increase the effectiveness to 99.99%. By minimizing the number of people who enter a situation where abortion becomes an option, it's legality or criminality becomes statistically less relevant. In summary, the solution to abortion is to stop the need for them to occur.