Thousands of people marched in Paris to demand an end to gay rights, six months before the next presidential election in France, according to a report from the Associated Press. The marchers also said they were fighting against assisted reproduction techniques and surrogate mothers, who help same-sex couples to have children of their own.

Surrogacy is actually banned in France, and only infertile heterosexual couples are allowed to receive assisted reproduction. The group that has organized the march says they want to promote the “traditional family model” that involves one mother and one father, and hopes that it will have an influence on the upcoming presidential election.

Gay marriage was legalized in a 2013 law in France, prompting protests both for and against.

The protesters gathered at the Porte de Dauphine in western Paris, and they marched to the Place du Trocadero in the center of Paris, according to a Reuters report.

Protesters toted signs reading “In 2017, I will vote for the family” or signs suggesting that women’s wombs are being sold in the case of surrogacy.

The law legalizing gay marriage was pushed forward after Francois Hollande won the presidency in 2012, and after the socialist party took the majority of seats in the French National Assembly. The bill was introduced in November 2012 and passed February 2013 by a 329-229 vote.