Le Bourg Eric
Centre de Recherche sur la Cognition Animale, UMR CNRS 5169, Université Paul-Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France.
Ageing Res Rev. 2007 Aug;6(2):141-9. doi: 10.1016/j.arr.2007.04.002. Epub 2007 May 1.
According to the disposable soma theory, a cost for reproduction could exist in human beings and other species and, thus, longevity could decrease when women have a higher number of children. The purpose of this article is to review the evidence in populations living or not living under natural fertility conditions, i.e. when fertility is near its biological maximum. The results indicate that in natural fertility conditions longevity does not decrease when the number of children increases but, in modern populations, mortality could slightly increase when women have more than ca 5 children. Complete data for these modern cohorts will tell us, one day, whether these results are still observed when the variable of interest is longevity and not only mortality.
根据一次性体细胞理论，人类和其他物种可能存在繁殖成本，因此，当女性生育子女数量较多时，寿命可能会缩短。本文的目的是回顾在自然生育条件下（即生育能力接近其生物学最大值时）生活或未生活在该条件下的人群的相关证据。结果表明，在自然生育条件下，子女数量增加时寿命不会缩短，但在现代人群中，当女性生育超过约5个孩子时，死亡率可能会略有上升。这些现代队列的完整数据终有一天会告诉我们，当关注的变量是寿命而非仅仅是死亡率时，这些结果是否仍然成立。
