[8] In 2003, de la Rochère joined the communications team of the Bishops' Conference of France, where she met Frigide Barjot.
[9] Together, they and Albéric Dumont decided to found La Manif pour tous to fight against a law enabling same-sex couples to get married in France.
[12] After internal disagreements, Barjot left the group and de la Rochère took over as spokesperson for the movement.
[17] De la Rochère has voiced her opposition to surrogacy, comparing it to a "modern version of trafficking".
[20] She also more recently opposed the extension of assisted reproductive technology to single women and lesbian couples.