Trigger laws are statutes enacted by state legislatures that are designed to take effect automatically or come into play under specific circumstances, particularly related to abortion rights. These laws are often contingent upon the overturning of a precedent like Roe v. Wade, which previously protected the right to abortion at the federal level. When such a legal change occurs, trigger laws can impose stricter regulations or outright bans on abortion within the state, thus significantly impacting reproductive rights.