Mothers with higher twinning propensity had lower fertility in pre-industrial Europe - Nature.com

The question of whether women who produce twins are more fertile than other women has been debated. Here, the authors analyze a large dataset of pre-industrial birth outcomes and find evidence against the idea of higher fertility and instead that more births …

Data preparation Historical data The primary source of data is historical parish registers, which have been transcribed under the supervision of many of the study authors over a number of decades, … [+25224 chars]

full article...