“…In Scotland maternal mortality actually increased between 1900 and 1930. 3 In the United States, too, maternal mortality remained more or less constant at one of the highest recorded levels in the world, although a large and rapidly growing proportion of deliveries after 1920 took place in hospital under the care of specialist obstetricians (table I).4-7 Even in Denmark, Holland, and Scandinavia, where low maternal mortality was a constant reproach to the British and Americans, rates tended to stay level rather than to fall.5 8 Some of these aspects of the history of maternal mortality were discussed in two previous papers.9'0 This paper is concerned specifically with puerperal fever: why the death rate from puerperal fever remained so high until the mid-1930s and what led to the subsequent steep and sustained fall. The chronological boundaries are 1911, when the International List of Causes of Death (the ICD classification) was adopted by Britain, and 1945, when the profound fall in maternal mortality was firmly established and the mortality had fallen to only one third of the rate in 1934.…”