Two years after passing a civil unions law for gay and lesbian couples, Mexico City is preparing to debate gay marriage, the AFP reported.

Democratic Revolutionary Party (PRD) assemblyman David Razu introduced the bill at a press event on Tuesday.

“We only want everyone treated equally under the law, there is no intention to violate anyone's rights, this simply acknowledges the rights of one social sector with no detriment to another,” he said.

The bill leaves the issue of adoption open. Razu said he expects the issue to be heavily discussed throughout the legislative process.

Uruguay recently approved bills that allow gay couples to enter civil unions and adopt. Argentine lawmakers are considering a gay marriage law. In 2002, Buenos Aires, the nation's capital and largest city, legalized civil unions for gay and lesbian couples. Four other Argentine cities followed.

Mexico's influential Roman Catholic Church opposes the city's bid to recognize gay nuptials.

“The Church believes that marriage is not only a contract but a sacrament instituted by God for a man and a woman to share life together and be the nucleus of society,” father Jose De Jesus Aguilar of the Archdiocese of Mexico told the AP Monday.

Razu said he believed the bill would be approved before the end of the year.