Opponents of the law say France is not ready to legalise adoption for same-sex couples, and polls show that the country is sharply divided on the issue, despite French parliament passing it into law today.
France has become the 14th country to legalise same-sex marriage following New Zealand last week.
Thousands of police mobilised ahead of the vote, preparing for dueling protests around the National Assembly building and along the Seine River. At least one spectator was ejected from the gallery.
More top news
The Liberal Democrats have proposed to invest an extra £10 million in mental health care for military personnel
David Cameron hopes to set out a positive vision of Toryism for ethnic minorities predicting the UK's first black PM will be Conservative
Dog lover Simon Cowell will appear to resist the lure of a hypnotic dog in tonight's Britain's Got Talent show - or does he?