The decline of non-marital fertility in Europe, 1880-1940.

Abstract Between 1880 and 1940, to take approximate dates, illegitimate fertility rates in Europe dropped precipitously, falling in most countries by 50% or more. The rates used throughout this paper relate extra-marital births to the number of unmarried (i.e. single, widowed and divorced) women; we use a standardized index, I ({ih}) to be discussed later. In Fig. 1 we present most of the European series of I ( h )'s that can be computed from existing census and vital registration data. Although there are interesting exceptions the general picture is clear: a decline in illegitimate fertility commenced in most countries in the last quarter of the nineteenth century, and was arrested in the 1920's and 1930's. Once it had begun in a country, the downward course was swift and uninterrupted, until non-marital fertility had been cut in half.