Four Romanians are to appear this week in court in Marseille on suspicions of involvement in a baby trafficking network. They face up to 10 years in prison.
France is to impose plain packaging for cigarettes as part of an anti-cancer drive that also sees extra taxes on manufacturers and more steps to stop sales to minors.
The bodies of five newborn babies were found on Thursday in a house near Bordeaux, southwestern France.
The Council of Europe has ruled that France is in violation of a European rights treaty because it has not completely banned the smacking of children.
France is preparing for criticism from the Council of Europe human rights body on Wednesday after media reported it would be condemned for failing to clearly ban the smacking of children.