At a pivotal time in the abortion debate, Ms. magazine is releasing its fall issue next week with a cover story titled "We Had Abortions," accompanied by the names of thousands of women nationwide who signed a petition making that declaration. The publication coincides with what the abortion-rights movement considers a watershed moment for its cause. Abortion access in many states is being curtailed, activists are uncertain about the stance of the U.S. Supreme Court, and South Dakotans vote Nov. 7 on a measure that would ban virtually all abortions in their state, even in cases of rape and incest....