References
- Ahlmann HW. The economical geography of Swedish Norrland. Geografiska Annaler 1921; 3: 97–164
- Beise J, Voland E. Effect of producing sons on maternal longevity in premodern populations. Science 2002; 298: 317
- de Zegher F, Devlieger H, Eeckels R. Fetal growth: Boys before girls. Horm Res 1999; 51: 258–259
- Doblhammer G, Oeppen J. The effect of frailty and mortality selection on the relationship between reproduction and longevity: Evidence from the British peerage. Proc R Soc Lond B 2003; 270: 1541–1547
- Dribe M. Long-term effects of childbearing on mortality: Evidence from pre-industrial Sweden. Popul Stud 2004; 58: 297–310
- Gibson MA, Mace R. Strong mothers bear more sons in rural Ethiopia. Proc R Soc Lond B (suppl.) 2003; 270: S108–S109
- Hames R, Draper P. Women's work, child care, and helpers-at-the-nest in a hunter–gatherer society. Hum Nat 2004; 15: 319–341
- Helle S, Lummaa V, Jokela J. Sons reduced maternal longevity in preindustrial humans. Science 2002; 296: 1085
- Hellström P. Norrlands jordbruk. Almqvist & Wicksell Boktryckeri AB, Uppsala 1917
- Hurt LS, Ronsmans C, Quigley M. Does the number of sons born affect long-term mortality of parents? A cohort study in rural Bangladesh. Proc R Soc Lond B 2006; 273: 149–155
- Jasienska G, Nenko I, Jasienski M. Daughters increase longevity of fathers, but daughters and sons equally reduce longevity of mothers. Am J Hum Biol 2006; 18: 422–425
- Kalben BB. Why men die younger: Causes of mortality differences by sex. N Am Actuar J 2000; 4: 83–111
- Kirkwood TBL. Evolution of aging. Nature 1977; 270: 301–304
- Kirkwood TBL, Austad SN. Why do we age?. Nature 2000; 408: 233–238
- Korpelainen H. Fitness, reproduction and longevity among European aristocratic and rural Finnish families in the 1700s and 1800s. Proc R Soc Lond B 2000; 267: 1765–1770
- Le Bourg E, Thon B, Legare J, Desjardins B, Charbonneau H. Reproductive life of French–Canadians in the 17–18th centuries: A search for a trade-off between early fecundity and longevity. Exp Geront 1993; 28: 217–232
- Loos RJF, Derom C, Eeckels R, Derom R, Vlietinck R. Length of gestation and birthweight in dizygotic twins. Lancet 2001; 358: 560–556
- Maconochie N, Roman E. Sex ratios: Are there natural variations within the human population?. BJOG 1997; 104: 1050–1053
- Maddison A. World Population, GDP and Per Capita GDP, 1–2003 AD. 2006, (http://www.ggdc.net/maddison/)
- Marsal K, Persson PH, Larsen T, Lilja H, Selbing A, Sultan B. Intrauterine growth curves based on ultrasonically estimated foetal weights. Acta Paediatr 1996; 85: 843–848
- Meulenberg PM, Hofman JA. Maternal testosterone and fetal sex. J Steroid Biochem Mol Biol 1991; 39: 51–54
- Müller H-G, Chiou J-M, Carey JR, Wang J-L. Fertility and lifespan: Late children enhance female longevity. J Gerontol A Biol Sci Med Sci 2002; 57: B202–B206
- Mueller U. A child later in life is not a life prolonging event. University of Marburg, Mimeo 2004
- Owens IPF. Sex differences in mortality rates. Science 2002; 297: 2008–2009
- Rodgers JL, Doughty D. Does having sons or girls run in the family?. Chance 2001; 14: 8–13
- Samuelsson G, Dehlin O. Family network and mortality: Survival chances through the lifespan on an entire cohort. Int J Aging Hum Dev 1993; 37: 277–295
- Stenflo GA. Demographic description of the Skellefteå and Sundsvall regions during the 19th century. Demographic database, Umeå 1994
- Tamimi R, Lagiou P, Mucci L, Hsieh C-C, Adami H-O, Trichopoulos D. Average energy intake among pregnant women carrying a boy compared to a girl. BMJ 2003; 326: 1245–1246
- Teitelbaum MS. Factors associated with the sex ratio in human populations. The structure of human populations, GA Harrison, AJ Sonce. Clarendon Press, Oxford 1972; 90–109
- Turke P. Helpers-at-the-nest: Childcare networks on ifaluk. Human reproductive behavior: A Darwinian perspective, L Betzig, M Borgerhoff Mulder, P Turke. Cambridge University Press, Cambridge 1988; 173–188
- Van de Putte B, Matthijs K, Vlietinck R. A social component in the negative effect of sons on maternal longevity in pre-industrial humans. J Biosoc Sci 2004; 36: 289–197