Life began billions of years ago and is a continuum. Placing a point on when it begins for a fetus is arbitrary, though birth is a vivid event and confronts our senses. Most of all, it confronts the woman involved. It was her egg, that was linked genetically in direct line back hundreds of thousands of years at least to an ancestral mother, that was fertilized. Every month of her fertile years, nature determines one of these passes out of potentiality to replicate her kind. Essentially, any month she is not pregnant a woman decides that a person will not be born. If a sperm is in the egg, then, it is the sperm that somehow changes things. 'Anti-abortionists', thus, need to pursue men for the change of situation.