If men could get pregnant, abortion would be a sacrament.
Florynce "Flo" Kennedy (1916-2000) American lawyer, feminist, civil rights activist
Speech, Washington, DC (15 May 1971)
Quoted in Off Our Backs (24 Jun 1971). Gloria Steinem, who also used the phrase, later claimed it was said to her and Kennedy by an "old Irish woman taxi driver" in Boston, but she attributed it at other times to Kennedy herself. More info here.