The tragedy happened on Tuesday afternoon on the road 90B, between Saizerais and Liverdun, Meurthe-et-Moselle.
To 16.50, a Renault Twingo is coming into collision with an Audi A4 station wagon.
Firefighters arrived on the scene, tried in vain to resuscitate the baby who was in the renault Twingo. But they could only certify the death of this child, aged only a few months.
His mom, 25-year-old, was transported to the hospital where she lies between life and death.
The three occupants of the Audi, a woman of 42 years old, they were taken to the emergency room. Their days would not be in danger.