What shall we do in front of a new born looking as a dead one? François Chaussier (1746-1828) recommended Oxygen gas (Dijon 1781) and, further laryngo-intubation (Paris 1806). Closely versed in basic sciences, it did not need to be very bold to do the trick in such an occurence. Senior-Physician in Paris Maternity Hospital from 1804 to his death, he was Senior-Obstetricians' intimate friend (Jean-Louis Baudelocque and, after 1810, Antoine and Paul Dubois) as well as with Senior-Midwives, chiefly Madame La chapelle who died in 1821. Then, that Maternity Hospital, not only reputed for obstetrics success get mother-and-baby pathology top marks under Chaussier.