The Life Training Institute (LTI) provides three steps to be taken to defend the pro-life position in 5 minutes or less. The three steps are:
1. Clarify the issue. It boils down to the question, what is the unborn? If the unborn are members of the human family then killing them for the benefit of others is morally wrong. On the other hand if they are not a member of the human family then killing them for any reason requires no more justification than having a tooth pulled.
2. Defend your pro-life position with science and philosophy. Embryology has confirmed that at conception the zygote is the beginning of a new human life. Philosophy tells us that there is no morally significant difference between the embryo you once were and the adult you are now. This is where the acronym SLED is helpful. The factors of size, level of development, environment, and degree of dependency cannot allow us to say that as an embryo you had no rights but now you do.
3. Challenge your listeners to be intellectually honest. This can be done by asking tough questions.
You can read the article in full here. LTI has plenty of other excellent resources to aid in graciously defending the pro-life position.
Stand firm in Christ,