Here’s a late-18th-century argument against abortion from a feminist milestone book:
“Women becoming, consequently, weaker, in mind and body, than they ought to be, [if] one of the grand ends of their being [were] taken into account, that of bearing and nursing children, have not sufficient strength to discharge the first duty of a mother; and sacrificing to lasciviousness the parental affection, that ennobles instinct, either destroy the embryo in the womb, or cast it off when born. Nature in everything demands respect, and those who violate her laws seldom do so with impunity.”
That’s Mary Wollstonecraft (1759-1797) in her A Vindication of the Rights of Woman, quoted in an email from Feminists for Life.