I haven't read all the posts in this thread so you'll have to excuse me but I've thought about this issue a lot over the years and had many worthwhile discussions on the topic which have formed my current view. First and foremost, I do not think morality is an objective thing. I think it is something that developed through our evolution, which helped us survive and it continues to be altered or evolve in its own way as we gain better understanding of what is fair and promotes equality as we see those things as moral. The scientific evidence strongly suggests that life begins at conception, in fact I might be so bold to say that it's silly to think otherwise. The moment a sperm fertilizes an egg, the genes and sex are set. http://www.webmd.com/baby/guide/understanding-conception http://www.justfactsdaily.com/the-science-of-abortion-when-does-life-begin/ 1. Growth – As explained in the textbook Essentials of Human Development: A Life-Span View, “the zygote grows rapidly through cell division.” 2. Reproduction – Per Human Sexuality: An Encyclopedia, zygotes sometimes form identical twins, which is an act of “asexual reproduction.” (Also, in this context, the word “reproduction” is more accurately understood as “reproductive potential” instead of “active reproduction.” For example, three-year-old humans are manifestly alive, but they can’t actively reproduce.) 3. Metabolism – As detailed in the medical text Human Gametes and Preimplantation Embryos: Assessment and Diagnosis, “At the zygote stage,” the human embryo metabolizes “carboxylic acids pyruvate and lactate as its preferred energy substrates.” 4. Response to stimuli – Collins English Dictionary defines a “stimulus” as “any drug, agent, electrical impulse, or other factor able to cause a response in an organism.” Experiments have shown that zygotes are responsive to such factors. For example, a 2005 paper in the journal Human Reproduction Update notes that a compound called platelet-activating factor “acts upon the zygote” by stimulating “metabolism,” “cell-cycle progression,” and “viability.” “The zygote and early embryo are living human organisms.” Before We Are Born: Essentials of Embryology Life begins at conception. So, in a Utopian society following the morality of the western world I would prefer that no abortion ever occur. We don't live in a Utopian society though. Contraception can fail, rapes do occur, women's lives can be endangered during pregnancy. Given that these things do happen, I believe that all first trimester abortions should be allowed and the only abortions that would be allowed after the first trimester would be ones where the woman's life is at risk. I also think contraception should be widely available to all men and women so that unwanted pregnancies can be more easily avoided. I am strongly against the idea of a woman needing to prove that she was raped in order to get an abortion, that's a very traumatic experience and I will not fault a woman for not immediately getting a rape kit after she's been raped. It's just much more reasonable to allow all first trimester abortions. It's particularly in the second and third trimesters anyway where the fetus/child/baby can really feel pain and the process becomes quite grotesque.