Abortion-related measures were on the ballot in 10 states Tuesday, with advocates claiming seven victories and three states voting to keep restrictions.

Voters approved most of the referendums expanding the right to abortion in US states, while Florida, Nebraska and South Dakota rejected such measures, giving anti-abortion advocates their first victories since the US Supreme Court ended the constitutional right to the procedure in 2022.

Voters backed abortion rights in seven of the 10 states where the issue appeared on ballots Tuesday — at first glance, seemingly reshaping the nation’s patchwork of abortion rules. Colorado, Maryland, Montana, and New York — states where abortions are already permitted at least until fetal viability...