France\’s lower house of parliament has passed legislation permitting same-sex marriage, despite widespread opposition.

Approximately 100,000 demonstrators took to the streets in Paris on Sunday, the fourth major rally in Paris since November 18th. Demonstrations on January 13th and March 24th attracted approximately 800,000 and a million demonstrators, respectively.

The bill, which will also give same-sex couples the right to adopt, was approved in the Senate earlier this month, CNN reports.

Since no amendments have been made during debate in the lower house, it will be the final vote on the legislation. The measure passed by 331 votes to 225.

The left, which includes President Francois Hollande\’s governing Socialist Party, dominates the National Assembly.

President Hollande will have to sign the bill before it becomes law.

Opponents still hope to block the measure by referring it to the Constitutional Court.

Protesters on Sunday joined the latest in a series of marches through Paris against the measure, and they have vowed to carry on the fight.

One of the groups behind the marchers has urged protesters to rally again this evening and is planning more demonstrations around the country next month.