Macron says France needs to adapt its laws to better protect children from sexual violence and he had asked the justice minister to chair a consultation aimed at quickly making legislative proposals.

"We will go after the aggressors," Macron said in a series of Tweets on Saturday.

Macron said France had already increased the statute of limitations on incest to 30 years, counted from the legal age of majority of the victim, and had tightened controls on people working with children, but he said much more needed to be done.

He said that as part of current routine medical examinations for children, France would introduce sessions about incest in primary and secondary schools in order to give children a chance to talk about the issue.

He also said that better psychological help for victims of incest would be made available and it would be reimbursed by social security.

In recent weeks, hundreds of people have taken to social media to tell their stories of incest after the publication of the book accusing French professor and constitutional specialist Olivier Duhamel of abusing his stepson.

The book was written by Duhamel's stepdaughter Camille Kouchner, daughter of former foreign minister and founder of NGO Medecins Sans Frontieres Bernard Kouchner.

Duhamel resigned earlier this month from his post overseeing Sciences Po, one of France's top universities, following publication of the book.

"Being the object of personal attacks and wanting to preserve the institutions in which I work, I put an end to my functions," he said on Twitter on Jan. 4.

Neither Duhamel nor his lawyer have commented on the accusations dating back to the 1980s.

Australian Associated Press