Mexico's Supreme Court upheld the law allowing married same-sex couples to adopt children in its second landmark gay rights decision this month. The court, threw out a challenge led by the federal government to the part of the law approving gay marriage, but only ruled on Monday -- after more than a week of deliberations -- on the legislation's more controversial adoption provisions. Mexico City, the first Latin American capital to extend to same-sex couples the same marriage and adoption rights as heterosexuals.