The French National Assembly is due to vote on a bill to legalise gay marriage and allow same-sex couples to adopt children. The issue has exposed deep rifts in French society and prompted huge protests.
French President Francois Hollande has called for "responsibility" and "lucidity" from his Socialist lawmakers, days after his government was forced to ram an economic reforms package through parliament without a vote.
The French parliament is about to decide on a draft law aimed at boosting growth that would include allowing shops to open more often on a Sunday and a deregulation of some professions.
French lawmakers have narrowly approved 50 billion euros ($69 billion) in spending cuts designed to help meet deficit reduction targets. The plan is seen as the first major test for the country's new government.
In a rare move, French Prime Minister Manuel Valls has pushed through controversial economic reforms meant to jumpstart the country's anemic economy. The opposition has threatened a no-confidence vote.