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We compared 572 pregnant women (319 first-time mothers) surveyed in spring 2020, during the first wave of COVID-19 lockdowns in the United States, with 99 pregnant women (all first-time mothers) surveyed before the pandemic (2014–2020). Compared with the prepandemic sample, women assessed during the pandemic showed elevated depression, anxiety, and stress and weaker prenatal bonding to their infants. These findings remained significant when restricting the pandemic sample to first-time mothers only and held after controlling for race/ethnicity, education, and pregnancy stage. Average levels of depression and anxiety within the pandemic group exceeded clinically significant thresholds, and women who estimated that the pandemic had more negatively affected their social relationships reported higher distress. However, pandemic-related changes to social contact outside the household were inconsistently associated with mental health and with some positive outcomes (fewer depressive symptoms, stronger prenatal bonding). Given that prenatal stress may compromise maternal and child well-being, the pandemic may have long-term implications for population health.

Extensive research has established that fathers’ engagement in parenting benefits children, but few studies have described how fathers contribute to child development even before birth. In this article, we consider both direct and indirect pathways through which expectant fathers shape child development during the prenatal period. Regarding direct pathways, we review work on expectant fathers’ contributions to child development through genetic and epigenetic processes, as well as neuroendocrine mechanisms. Regarding indirect pathways, we outline ways in which expectant fathers indirectly influence child development through the couple relationship. In so doing, we seek to provide a foundation from which to formulate future lines of inquiry on the role of expectant fathers in child development. This research can inform clinical interventions and policies geared toward improving the early caregiving environment and child development.

Theories such as social baseline theory have argued that social groups serve a regulatory function but have not explored whether this regulatory process carries costs for the group. Allostatic load, the wear and tear on regulatory systems caused by chronic or frequent stress, is marked by diminished stress system flexibility and compromised recovery. We argue that allostatic load may develop within social groups as well and provide a model for how relationship dysfunction operates. Social allostatic load may be characterized by processes such as groups becoming locked into static patterns of interaction and may ultimately lead to up-regulation or down-regulation of a group’s set point, or the optimal range of arousal or affect around which the group tends to converge. Many studies of emotional and physiological linkage within groups have reported that highly correlated states of arousal, which may reflect failure to maintain a group-level regulatory baseline, occur in the context of stress, conflict, and relationship distress. Relationship strain may also place greater demands on neurocognitive regulatory processes. Just as allostatic load may be detrimental to individual health, social allostatic load may corrode relationship quality.

Social cognition may facilitate fathers' sensitive caregiving behavior. We administered the Why‐How Task, an fMRI task that elicits theory of mind processing, to expectant fathers (n = 39) who also visited the laboratory during their partner's pregnancy and provided a plasma sample for oxytocin assay. Three months postpartum, fathers reported their beliefs about parenting. When rating “Why” an action was being performed versus “How” the action was being performed (Why > How contrast), participants showed activation in regions theorized to support theory of mind, including the dorsomedial prefrontal cortex and superior temporal sulcus. Fathers' prenatal oxytocin levels predicted greater signal change during the Why > How contrast in the inferior parietal lobule. Both prenatal oxytocin and attunement parenting beliefs were associated with Why > How activation in the dorsolateral prefrontal cortex, a theory of mind region implicated in emotion regulation. Posterior parahippocampal gyrus and dorsolateral prefrontal cortex activation during the Why > How contrast predicted fathers' attunement parenting beliefs. In conclusion, fathers' neural activation when engaging in a theory of mind task was associated with their prenatal oxytocin levels and their postpartum attunement parenting beliefs. Results suggest biological and cognitive components of fathering may track with the theory of mind processing.