Life history theory predicts that exposure to high mortality in early childhood leads to faster and riskier reproductive strategies. Individuals who grew up in a high mortality regime will not overly wait until they find a suitable partner and form a stable union because premature death would prevent them from reproducing. Cox proportional hazard models were used to determine whether women who experienced sibling death during early childhood (0–5 years) reproduced earlier and were at an increased risk of giving birth to an illegitimate child, with illegitimacy serving as a proxy for risky sexual behavior. Furthermore, we investigate whether giving birth out of wedlock is influenced by individual mortality experience or by more promiscuous sexual behavior that is clustered in certain families. Models are fitted on pedigree data from the eighteenth- and nineteenth-century Krummhörn population in Germany. The results show a relationship between sibling death in early childhood and the risk of reproducing out of wedlock, and reproductive timing. The risk of giving birth out of wedlock is linked to individual mortality experience rather than to family-level effects. In contrast, adjustments in connubial reproductive timing are influenced more by family-level effects than by individual mortality experience.

中文翻译：

---

个人死亡率对18世纪和19世纪Krummhörn的非婚外生育力的影响。

生命史理论预测，在儿童早期暴露于高死亡率会导致更快和更危险的生殖策略。在高死亡率制度下长大的个体不会过分地等到找到合适的伴侣并结成稳定的工会，因为过早死亡会阻止他们繁殖。考克斯比例风险模型用于确定在幼儿期（0-5岁）内经历过同胞死亡的妇女是否较早繁殖并有更高的生下私生子的风险，而非婚生性可以代替危险的性行为。此外，我们调查了非婚生分娩是否受到个人死亡经验的影响，还是受到某些家庭中更多性行为的影响。模型是根据18世纪和19世纪德国Krummhörn人口的血统书进行拟合的。结果表明，儿童早期的同胞死亡与非婚生生殖风险以及生殖时间之间存在关系。非婚生的风险与个人的死亡经历有关，而不是与家庭层面的影响有关。相反，对夫妻生殖时间的调整受家庭影响的影响大于受个人死亡率影响的影响。