Genetics, Vol. 178, 601-603, January 2008, Copyright © 2008
doi:10.1534/genetics.107.072454

Human Fertility Increases With Marital Radius

* Department of Genetics and Biotechnology, Faculty of Agricultural Sciences, University of Aarhus, DK-8830 Tjele, Denmark and {dagger} University of Porto, Portugal and IPATIMUP, Rua Roberto Frias, 4200-465 Porto, Portugal

1 Corresponding author: Department of Genetics and Biotechnology, Faculty of Agricultural Sciences, University of Aarhus, Blichers Alle, Postbox 50, DK-8830 Tjele, Denmark.
E-mail: rodrigo.labouriau{at}agrsci.dk

We report a positive association between marital radius (distance between mates' birthplaces) and fertility detected in a large population. Spurious association due to socioeconomic factors is discarded by a conditional analysis involving income, education, and urbanicity. Strong evidence of consanguinity's deleterious effects affecting an entire human population is provided.