[1] Univ Poitiers, Hop Jean Bernard, Dept Gynecol & Obstet, Poitiers, France
[2] Univ Poitiers, Hop Jean Bernard, Poitou Charentes Perinatal Network, Poitiers, France
[3] Univ Poitiers, Hop Jean Bernard, Dept Anaesthesia, Poitiers, France
[4] Univ Poitiers, Hop Jean Bernard, Dept Med Intens Care, Poitiers, France