The Apostolic United Brethren (AUB) is a Mormon fundamentalist group that practices polygamy. The AUB has had a temple in Mexico, since at least the 1990s, an endowment house in Utah since the early 1980s and several other locations of worship to accommodate their members in Wyoming, Idaho, and Montana. Religious scholar J. Gordon Melton characterised the group as "the more liberal branch of the Fundamentalist movement", as the group allows sexual relations apart from the strict purpose of procreation.