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The postnatal testosterone rebound in first-time fathers and the quality and quantity of paternal care
Developmental Psychobiology ( IF 2.2 ) Pub Date : 2020-12-03 , DOI: 10.1002/dev.22064
Randy Corpuz 1 , Sophia D'Alessandro 1 , Gillian K S Collom 1
Affiliation  

In human males, testosterone (T) decreases in the period following the birth of offspring. This decline has been widely interpreted as a facultative neuroendocrine response that facilitates parenting effort. Conversely, research on if (or when) this decline in T would be followed by an eventual recovery and subsequent shift away from parenting effort is lacking. In a U.S. community sample of 225 males transitioning to first-time fatherhood, we measured T at three occasions: third trimester, infant 3 months postnatal, and infant 9–10 months postnatal. Using a piecewise latent growth curve model (GCM), we detected a T rebound from when infants were 3 months old to when infants were 9-10 months old. The slope of this rebound was able to predict paternal care using two distinct measures: (a) an experience sampling method (ESM) that gathered data on paternal time allocation over the course of the study period and (b) independent coders rating fathers for the quality of paternal care during a structured task designed to elicit an infant fear response. As predicted, the more accelerated one’s T rebound (slope), the less time fathers invested in their infants across the study period. However, we found a positive relationship between T rebound and quality of paternal care during a challenging activity. Discussion will focus on nuanced reasons that contribute to these findings as well as speculate on the ultimate function of a human paternal T rebound.

中文翻译:

第一次做父亲的产后睾酮反弹与父亲护理的质量和数量

在人类男性中,睾酮 (T) 在后代出生后的时期内下降。这种下降被广泛解释为促进育儿努力的兼性神经内分泌反应。相反,缺乏关于 T 的这种下降是否(或何时)会导致最终恢复以及随后从育儿努力转变的研究。在美国社区样本中,有 225 名男性过渡到第一次当父亲,我们在三个场合测量了 T:妊娠晚期、产后 3 个月的婴儿和产后 9-10 个月的婴儿。使用分段潜伏生长曲线模型 (GCM),我们检测到从婴儿 3 个月大到婴儿 9-10 个月大时的 T 反弹。这种反弹的斜率能够使用两种不同的措施来预测父亲的照顾:(a) 一种经验抽样方法 (ESM),收集研究期间父亲时间分配的数据,以及 (b) 独立编码员在旨在引发婴儿恐惧反应的结构化任务期间对父亲的父亲护理质量进行评级。正如预测的那样,一个人的 T 反弹(斜率)越加速,父亲在整个研究期间投入到婴儿身上的时间就越少。然而,我们发现在具有挑战性的活动中,T 反弹与父亲护理质量之间存在正相关关系。讨论将集中于促成这些发现的细微原因,并推测人类父亲 T 反弹的最终功能。
更新日期:2020-12-03
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