BE AN ABORTION OPPONENT. Since there are no actually-valid reasons to oppose abortion, there can only be hateful, stupid, selfish reasons to oppose abortion.
Hateful: Wanting genetically defective bodies to get born, so that when they eventually develop person-class minds, every single one of those minds will suffer from its body's disabilities for a lifetime.
Stupid: Thinking that the world is not so overpopulated with humans that any tool that doesn't target people, while helping prevent a Malthusian Catastrophe, is not a good thing.
Selfish: Wanting more consumers to get born, to increase Demand and drive up prices for everyone (for the profit of politically conservative business-owners), while simultaneously wanting more workers to get born, to increase competition for jobs and thereby prevent wages from rising (also for the profit of politically conservative business owners).
NOT WHAT ABORTION DOES. No unborn human qualifies as "a being" (a generic person), any more than a rat qualifies as "a being". Sure, the unborn human is human (so is a cuticle cell, or a hydatidiform mole), but that fact ALONE doesn't make it a "being", and therefore it is just a Stupid Lie to call it (or a cuticle cell or a hydatidiform mole) "a human being" (a person that happens to also be a human).