Father-infant Interactions Research Articles

Interactive synchrony and infants' vagal tone as an index of emotion regulation: associations within each mother- and father-infant dyad and across dyads.

Studies have shown that infants' emotion regulation capacities are closely linked to the quality of parent-infant interactions. However, these links have been mostly studied in mother-infant dyads and less is known about how the quality of father-infant interactions contributes to the development of emotion regulation during infancy. In this study, we aimed to investigate the links between interactive synchrony (i.e., an index of the quality of parent-infant coordination of interactive behaviors) and infants' vagal tone (i.e., a physiological index of emotion regulation). To understand the respective contributions of both parents, as well as the interrelations between the functioning of both dyads within a family, we observed mothers and fathers from 84 families interacting with their infants. Synchrony was assessed by using the CARE-Index; infants' vagal tone was derived from the analysis of infants' electrocardiograms recorded during the interactions. Moreover, to take the play's order into account, we counterbalanced the procedure, so that approximately half of the mothers played first. We specified a first structural equation modeling (SEM) model to investigate the associations between interactive synchrony and the infants' root mean square of successive differences (RMSSD), an index of vagal regulation, in the two successive parts of the play. We conducted a multigroup analysis in a second SEM model to investigate the associations of the first SEM model in two groups based on the order of interaction. The results of the SEM models showed that greater synchrony was related to greater infant RMSSD within mother-infant dyads and across one dyad to the other dyad in the full sample and in the group of fathers who interacted first with the infants. The associations between synchrony and infant vagal tone within father-infant dyads never appeared to be significant, nor did any associations within each dyad and across dyads when mothers interacted first. This study highlights that the links between interactions and infants' vagal tone are sensitive to family members' interdependencies and some conditions (the order of interaction).

Mind-mindedness and styles of interaction of young fathers with their infants at three months: a pilot study

BackgroundFatherhood at a young age can be characterized by a multiproblematic background with several risk factors that can negatively affect father-child relationships, the father’s well-being and child’s social-emotional development.MethodsThis pilot study evaluated paternal interaction styles and mentalization in a sample of 22 young fathers and their 3-month-old infants and compared these variables with those of 22 adolescent and young mothers (the fathers’ partners). Parent-infant interaction were codified with Care-Index to evaluate styles of interaction and with Mind-Mindedness system to evaluate mentalization.ResultsThe results showed that young fathers had high scores in controlling behaviors and low scores in sensitivity, placing them in a risk range. The young father’s interaction profile did not differ from the young mother’s interaction profile. Infants had high scores in passive behaviors and low scores in cooperative behaviors, placing them in a high-risk range. Moreover, young fathers had more nonattuned mind-related comments than their partners.ConclusionsThe findings indicate that low responsiveness and low mind-mindedness characterize the quality of adolescent and young father-infant interactions, highlighting the value of providing early intervention to support the father–child relationship, enhancing the father’s sensitivity and his ability to keep the infant in mind.

The Lausanne Trilogue Play: bringing together developmental and systemic perspectives in clinical settings

AbstractDevelopmentalists have demonstrated that the quality of relationships established by infants with their proximal social environment is crucial for lifecourse development. However, studies of parent–infant relationships have mostly centred on the mother–child dyad. Stemming from family systems theory that considers interactions within the whole family as critical for an individual's personal development, a group of family therapists and researchers in Lausanne (Switzerland) tried to bridge the gap between systemic and developmental thinking by stressing the need to establish the mother–father–infant triad as a collective unit of study. In response, they created the Lausanne Trilogue Play (LTP), a method to systematically assess the quality of mother–father–infant interactions. The LTP is an observational situation during which parents are asked to play with their infant in four parts: (i) one parent plays with the infant, while the other parent is ‘simply present’; (ii) the parents switch roles; (iii) all three play together; (iv) the parents discuss in front of the infant. The theoretical model underpinning the LTP is the family alliance model, which postulates that the quality of the coordination demonstrated by the triad to achieve this task can be assessed mainly through careful observation of non‐verbal behaviours as indicators of the achievement of four interactive functions (i.e., participation, organisation, focalisation, affect sharing); fulfilment of these functions determines the quality of relational functioning within the system. This article introduces the clinical, theoretical, and empirical foundations of using the LTP method with the family alliance model; its use in clinical and research contexts; and the most recent advances in the field of research on mother–father–infant interactions based on the LTP situation.

Father-infant synchrony and infant vagal tone as an index of emotion regulation: father-infant shared times in Switzerland as moderators

ABSTRACT Research has shown that the quality of mother-infant interactions, as measured by mother-infant synchrony, is associated with infants’ vagal tone, a physiological indicator of emotion regulation. However, little is known about the association between the infant’s vagal tone and the quality of father-infant interactions. Existing literature suggests that the greater quantity of time a father spends with the infant, either alone (dyadic time) or with others (social time) may strengthen this association. In this study we investigated the association between father-infant synchrony and infants’ vagal tone in 77 dyads made up of fathers and their 3-month-old infants, considering the moderating roles of dyadic time and social time. Results revealed no direct associations between father-infant synchrony and infants’ vagal tone. Moderation analyses revealed that more social time increases the association between synchrony and vagal tone. This result indicates a potential influence of family interactive processes. Key findings Father-infant synchrony is not associated with infants’ vagal tone in father-infant interactions. The time that fathers share with infants facilitates associations between father-infant synchrony and infants’ vagal tone during father-infant interactions. Further investigations should explore whether interactive processes during shared family time influence dyadic father-infant interactions and the infant’s physiological emotion regulation at 3 months.

L’interaction précoce parent–bébé à travers le prisme du père. Un regard rétrospectif sur la recherche des dernières décennies

After many years of research focused on the mother-infant dyad, the literature has gradually turned its attention to father-infant interactions. This literature review aims to provide a synthesis of knowledge on the father-infant dyad. Thus, the first part summarizes a set of works that have explored paternal behaviour within the father-baby dyad in comparison with maternal behaviour observed within the mother-baby dyad. In the second part, the article explores the early father-baby exchange as a subsystem of the family system, a triadic approach which allows a direct comparison of the two parents and gives access to different dyadic configurations. A third part presents more contemporary studies, carried out in particular from the neonatal period, with a look at the situations of vulnerability which remain less invested when it comes to the father than when it comes to the mother. Finally, we end the article with a reflection on the father, a partner of the baby who is still understudied, in a societal context that is nonetheless evolving in terms of the place he is given.

Maternal and paternal depressive symptoms and parental vocalisation behaviours in infancy: findings from UK-based birth cohort

BackgroundBoth maternal and paternal postnatal depression (PND) are associated with increased risk of less optimal offspring developmental outcomes. Early exposure to differences in maternal and paternal vocalisation behaviours associated with maternal and paternal PND may be important in this relationship. However, little research has captured vocalisation patterns at home without researchers present.ObjectivesThis study sought to examine the associations between maternal and paternal PND and various aspects of parental vocalisation behaviours.MethodsMothers (n = 104) and fathers (n = 34) of six-months old infants from the Avon Longitudinal Study of Parents and Children Generation-2 (ALSPAC-G2) provided video footage of mother- and father-infant interactions filmed at home using the head-worn video cameras (headcams) without the need for researchers to be present. Twenty-five mother-infant and father-infant interactions were coded on multiple aspects of parental and infant vocalisation behaviours using the micro-behavioural observational coding system. Parental (PND) was measured using the Edinburgh Postnatal Depression Scale (EPDS; total score).ResultsFrequencies and duration of vocalisation behaviours were similar in mothers and fathers. However, there was an indication that fathers demonstrated higher frequency and duration of commands, exclamations and ironic/sarcastic tone, and criticisms compared to mothers, while mothers engaged in more teaching compared to fathers. Linear regression models indicated that maternal and paternal PND were not associated with the majority of vocalisation behaviours. However, there were some specific patterns observed, mostly related to the emotional tone of the vocalisations. Higher levels of maternal PND were associated with lower frequency of speech in a neutral tone, frequency and duration of use of humour, and increased duration of speech in a positive tone. Higher levels of paternal PND were associated with higher mean duration of speech, infant-directed speech, higher frequency and duration of laughing, and increased duration of speech using questions and encouragement.ConclusionThese findings extend existing research by investigating the associations between maternal and paternal PND and a wide range of vocalisation behaviours captured and coded using innovative methods and in a more ecologically valid way than previous studies.

Effects of kangaroo mother care on maternal and paternal health: systematic review and meta-analysis.

To investigate the effect of kangaroo mother care for low-birth-weight and preterm infants on parents' mental and physical health. The Cochrane Central Register of Controlled Trials, Cochrane Register of Studies Online, PubMed®, Web of Science, Scopus and EMBASE® databases were searched on 16January 2023 for randomized and quasi-randomized trials on kangaroo mother care. Records identified were screened independently by two reviewers. Pooled relative risks (RRs) are reported for categorical variables, and standardized mean differences (SMDs) or mean differences are reported for continuous variables. Evidence quality was assessed using the GRADE approach. The search identified 30 studies involving 7719 preterm or low-birth-weight infants. There was high-certainty evidence that kangaroo mother care substantially reduced the risk of moderate-to-severe postpartum maternal depressive symptoms compared with no kangaroo mother care (RR: 0.76; 95% confidence interval, CI: 0.59 to 0.96). In addition, there was low-certainty evidence that kangaroo mother care reduced scores for maternal stress (SMD: -0.82; 95% CI: -1.32 to -0.32) and anxiety (SMD: -0.62; 95% CI: -1.01 to -0.23) and increased mother-infant attachment and bonding scores (SMD: 1.19; 95% CI: 0.27 to 2.10). Limited evidence indicated father-infant interactions may be improved, though no marked effect on paternal depression or stress was observed. No trial reported parental physical health outcomes. Kangaroo mother care for preterm and low-birth-weight infants was associated with less postpartum maternal depression, stress and anxiety and better mother-infant attachment and bonding. More research is required to evaluate effects on paternal health.

WHO Global Position Paper and Implementation Strategy on kangaroo mother care call for fundamental reorganisation of maternal–infant care

WHO Global Position Paper and Implementation Strategy on kangaroo mother care call for fundamental reorganisation of maternal–infant care

Adult attachment as a predictor of maternal gatekeeping among new parents

AbstractThis study examined the associations between expectant couples' adult attachment styles and new mothers' gatekeeping (i.e., maternal behaviors that may inhibit or encourage father involvement in parenting) at the transition to parenthood. Data were drawn from a study of 182 different‐gender dual‐earner couples followed from the third trimester of pregnancy through 3 months postpartum. In the third trimester, expectant parents reported their attachment anxiety and avoidance. At 3 months postpartum, mothers and fathers reported on mothers' gate opening and gate closing behaviors. Also, at 3 months postpartum, maternal gate opening and gate closing were coded during mother–father–infant interactions in play and caregiving. Actor–Partner Interdependence Models were conducted in IBM SPSS AMOS 21.0. Findings indicated that higher maternal anxiety predicted higher mother‐reported maternal gate closing, whereas higher paternal avoidance and higher paternal anxiety predicted lower father‐reported maternal gate opening. During caregiving, higher paternal anxiety predicted higher observed maternal gate closing, and higher maternal anxiety predicted lower observed maternal gate opening. Findings reveal the importance of attachment in coparenting relationships among new parents, as attachment anxiety and avoidance may shape maternal behaviors encouraging or hindering father involvement in parenting.

Fathers’ sensitive parenting enhanced by prenatal video-feedback: a randomized controlled trial using ultrasound imaging

BackgroundThe aim of this study was to evaluate an interaction-based prenatal parenting intervention program aimed at promoting parental sensitivity and involvement in expectant fathers using ultrasound images: Prenatal Video-Feedback Intervention to Promote Positive Parenting (VIPP-PRE).MethodsIn this randomized controlled trial, 73 first-time, healthy expectant fathers were enrolled. Participants were randomly assigned to the VIPP-PRE intervention (n = 39) or a dummy intervention (n = 34). Parental sensitivity was coded from video-recorded 10-min interactions with an infant simulator at a prenatal pretest and with fathers’ own infant at a postnatal posttest. Prenatal and postnatal involvement was assessed via an application on participants’ smartphones.ResultsFathers receiving VIPP-PRE demonstrated increased sensitivity across the perinatal period, relative to fathers receiving a dummy intervention. Fathers’ involvement with the infant increased significantly from the prenatal to postnatal period, regardless of the intervention.ConclusionsPrenatal video-feedback using ultrasound imaging of the unborn child has the potential to promote the quality of parenting in an important, but understudied, population and period: men in the transition to fatherhood. Future research should examine the long-term effectiveness of VIPP-PRE and its effectiveness in increasing parenting quality in at-risk families.ImpactThis study identifies a brief and focused prenatal intervention using assisted interactions between the father and his baby by means of ultrasound imaging as a promising strategy to improve sensitive fathering in the early postnatal phase.Our study shows that pregnancy provides a window of opportunity for promoting prenatal involvement and bonding in expectant fathers, with potential long-term benefits for the future father–child relationship.Ultrasound measures are currently used to monitor fetal growth and development, but our results suggest that they may also create an opportunity for stimulating father–infant interaction to promote postnatal caregiving quality.

Dyadic parent-infant interaction patterns at 12 months: Exploring dyadic parent-infant gender compositions.

This study investigates differences in dyadic mother–infant and father–infant interaction patterns at infant age 12 months, and the relation between different parent–infant gender compositions and the dyadic interaction. Data were drawn from a large‐scale, population‐based Norwegian community sample comprising 671 mother–infant and 337 father–infant interactions. The Early Relational Health Screen (ERHS), a screening method for observing dyadic parent–infant interactions, was used to assess the parent–infant interactions. Scores on the ERHS were employed to investigate dyadic differences in the overall interaction scores, and dyadic interaction on seven sub‐dimensions between mother–infant and father–infant pairs. The relation between different parent–infant gender compositions and the dyadic interaction scores was also examined. As expected in a normative sample, most parent–infant interactions received scores in the upper rating levels. Differences between mother–infant and father–infant patterns were generally small, but mother–infant dyads tended to obtain slightly higher scores. The mother–infant dyads received higher scores on the dimensions of engagement and enjoyment, but no other significant differences between the parent–infant pairs were found for the remaining dimensions. We did not find evidence for a moderation effect of child gender. However, parent–daughter dyads received somewhat higher scores than the parent–son dyads.

Effects of a hybrid online and offline program for facilitating father-infant interactions in South Korea: a quasi-experimental study.

PurposeThis study examined the effects of an educational program for fathers on improving father-infant interactions, child-rearing knowledge, and attachment.MethodsIn this quasi-experimental study, the participants were recruited by convenience sampling among fathers with infants (2-6 months of age) residing in three districts of Seoul. Fifteen participants in the experimental group and 17 participants in the control group completed the follow-up investigation. A 5-week online and offline intervention program with five sessions was provided to the experimental group. The data were analyzed using generalized estimating equations (GEEs).ResultsThere was a significant difference in the change in father-infant interaction scores of the experimental group, especially in the caregiver aspect with a significance level of .100 in time and group-to-group interactions (B=6.46, p=.051, 95% confidence interval [CI]=-0.02-12.94). The changes between the groups and times were not statistically significant when it came to infant development knowledge and father-infant attachment.ConclusionWe conclude that hybrid online and offline education should be implemented as an effective method to improve fathers’ interactions with their children based on accurate knowledge about infant development.

Pleasure in parenting as a mediator between fathers' attachment representations and paternal sensitivity.

The present study examined the mediating role of pleasure in parenting in the link between fathers' attachment representations and paternal sensitivity among 138 father-infant dyads from a rural part of the southeastern United States. First-time fathers' attachment representations were assessed using the Adult Attachment Interview (AAI) prenatally. Pleasure in parenting-a multidimensional construct assessing positive attitudes and beliefs toward the parenting role-was coded from fathers' interviews at 3 months. Paternal sensitivity was coded from father-infant play interactions at 12 months. Results indicated that fathers with secure-autonomous adult attachment representations showed more pleasure in parenting. In turn, fathers who took more pleasure in parenting also interacted more sensitively during father-infant interactions. Moreover, although the direct association between fathers' attachment representations and sensitivity was nonsignificant, the indirect effect from secure-autonomous representations to sensitivity via pleasure in parenting was significant. Findings suggest that first-time fathers' parenting attitudes may play a role in transmitting representations of early caregiving experiences to sensitive interactions with their own infants. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Neurobiological Correlates of Fatherhood During the Postpartum Period: A Scoping Review.

During the postpartum period, the paternal brain suffers extensive and complex neurobiological alterations, through the experience of father–infant interactions. Although the impact of such experience in the mother has been increasingly studied over the past years, less is known about the neurobiological correlates of fatherhood—that is, the alterations in the brain and other physiological systems associated with the experience of fatherhood. With the present study, we aimed to perform a scoping review of the available literature on the genetic, neuroendocrine, and brain correlates of fatherhood and identify the main gaps in the current knowledge. PubMed, Scopus, and Web of Science electronic databases were searched for eligible studies on paternal neuroplasticity during the postpartum period, over the past 15 years. Reference lists of relevant key studies and reviews were also hand-searched. The research team independently screened the identified studies based on the established inclusion criteria. Extracted data were analyzed using tables and descriptive synthesis. Among the 29 studies that met our inclusion criteria, the vast majority pertained to neuroendocrine correlates of fatherhood (n = 19), followed by brain activity or connectivity (n = 7), association studies of candidate genes (n = 2), and brain structure correlates (n = 1). Collectively, studies published during the past 15 years suggest the existence of significant endocrine (testosterone, oxytocin, prolactin, and cortisol levels) and neurofunctional alterations (changed activity in several brain networks related to empathy and approach motivation, emotional processing and mentalizing, emotion regulation, dorsal attention, and default mode networks) as a result of fatherhood, as well as preliminary evidence of genetic variability accounting for individual differences during the postpartum period in fathers. No studies were so far published evaluating epigenetic mechanisms associated with the paternal brain, something that was also the focus of the current review. We highlight the need for further research that examines neuroplasticity during the experience of fatherhood and that considers both the interplay between hormones and simultaneous assessment of the different biomarkers (e.g., associations between hormones and neural activity); data collection protocols and assessment times should also be refined.

Exploring the role of endocrine factors in sensitive parenting in men

Parental sensitivity has been studied extensively in parenting research. Recently, there has been increasing attention to endocrine factors that may be related to parental sensitivity, such as oxytocin, vasopressin, testosterone, and cortisol. Although hormones do not act in isolation, few studies integrated multiple hormones and examined their combined associations with parental sensitivity. The current study aimed to explore the hormonal correlates of paternal sensitivity by examining in 79 first-time fathers of young infants (2–4 months old) (1) the separate and combined associations of basal oxytocin, vasopressin, testosterone, and cortisol levels with sensitivity, and (2) the associations between paternal sensitivity and oxytocin, vasopressin, testosterone, and cortisol reactivity following father-infant interactions. We additionally explored whether interactions between the various basal hormone levels could predict paternal sensitivity. Saliva for the quantification of fathers' hormone levels was sampled before and after an interaction with their infant to determine basal levels and reactivity. Results revealed no significant associations between sensitivity and basal hormone levels or reactivity. However, results indicated that cortisol and testosterone interacted in their effects on paternal sensitive parenting. Namely, fathers with low basal cortisol levels showed more sensitivity with increasing T levels, but fathers with high cortisol levels were less sensitive with increasing T levels. However, it should be noted that the latter slope was not significantly different from zero. These findings suggest that variations in parental sensitivity might be better explained by interactions between hormones than by single hormone levels.

Assessment of factors and father-infant attachment levels among Turkish's fathers of preterm infants

PurposeIdentify the factors affecting father-infant attachment among Turkishs fathers of preterm infants. Design and methodsThis cross-sectional study included 63 fathers of preterm infants between the ages of 6-12 months. Data were collected using the Father-Infant Descriptive Information Form and the Paternal-Infant Attachment Scale (PIAS). Descriptive statistics, independent sample t-tests, mann-whitney test, the kruskal wallis test, the tamhane test, spearman correlation analysis, and linear stepwise regression were used to evaluate the data. ResultsThe average PIAS scores of the fathers in the study was 62.97 ± 8.94. A statistically significant difference was found between the birth weight, clinical picture, and length of stay in the Neonatal Intensive Care Unit (NICU) and PIAS total score of preterm infants (p < 0.01). There was a significant difference between the unplanned hospitalization of the baby after discharge and the father's changing the baby's clothes and the PIAS score (p < 0.05). Birth weight and unplanned hospitalization explained 31% of PIAS total score. ConclusionsAccording to the results, father-infant attachment levels of fathers of preterm infants were low. Father's involvement in changing the baby's clothes, preterm birth weight, clinical picture, and length of stay in the NICU were found to be associated with PIAS. Practical implicationsIt should be remembered that babies can be attached to their fathers as much as they are to their mothers. NICU nurses should initiate father-infant interaction early and ensure fathers' involvement in infant care in the NICU.

Effect of Play2Sleep on mother-reported and father-reported infant sleep: a sequential explanatory mixed-methods study of a randomized controlled trial.

This study evaluated the effect on infant sleep of a novel intervention (Play2Sleep) that combined infant sleep information with self-modeled video feedback on parent-infant interactions. An explanatory sequential mixed-methods design consisting of a randomized controlled trial with 63 mother-father-infant triads randomized to Play2Sleep or comparison home visit interventions was used. We used repeated measures analysis of covariance to detect changes in infant night wakings, nocturnal wakefulness, and sleep durations and Wilcoxon signed rank test to evaluate changes in perception of infant sleep problems. Family interviews (n = 20) were used to explain the quantitative findings and analyzed qualitatively using thematic analysis. Play2Sleep was effective in reducing maternal-reported infant wakefulness, F(1,55) = 5.33, P = .03, partial η2 = .09, and the number of paternal-reported naps, F(1,58) = 4.90, P = .03, partial η2 = .08. Parents in the Play2Sleep group reported significant improvements in problematic infant sleep that were not observed in the comparison group; however, Play2Sleep was not effective in reducing the number of parent-reported night wakings. Information overwhelm, learning infant cues, and working together with a subtheme of father involvement were key qualitative themes developed to explain the quantitative results. Unplanned exploratory analyses revealed a significant improvement in maternal depression symptoms in the Play2Sleep group. This study suggests Play2Sleep could improve infant sleep by promoting parental awareness of infant cues and father involvement and improving maternal depression. Additional research is needed to determine the optimal number and timing of sessions. Registry: ClinicalTrials.gov; Name: Play2Sleep: Using Play to Improve Sleep; URL: https://clinicaltrials.gov/ct2/show/NCT02742155; Identifier: NCT02742155. Keys EM, Benzies KM, Kirk VG, Duffett-Leger L. Effect of Play2Sleep on mother-reported and father-reported infant sleep: a sequential explanatory mixed-methods study of a randomized controlled trial. J Clin Sleep Med. 2022;18(2):439-452.

Physical touch during father-infant interactions is associated with paternal oxytocin levels

IntroductionPhysical connection, particularly parent-to-infant touch, is critical for the well-being of infants and may support the development of the parent-infant bond. Physical touch has also been found to stimulate oxytocin levels. This study tested whether fathers' micro-coded touch behaviors during parent-child interaction predicted their subsequent oxytocin levels. We also compared two widely-used methods of oxytocin immunoassay that have been found to yield discrepant results in past studies. MethodsAmong 45 fathers and their six-month-old infants, we micro-coded paternal physical touch at 1/10 s intervals during a laboratory-based free-play interaction. Paternal oxytocin was measured via blood plasma and was processed both with and without the extraction step prior to immunoassay so that results from the two methods could be compared. ResultsUnextracted and extracted oxytocin were moderately correlated within our sample. Fathers who engaged in more playful proprioceptive touch showed higher levels of both unextracted and extracted oxytocin. Gentle affectionate touch and functional proprioceptive touch predicted higher unextracted but not extracted oxytocin levels. Fathers who did not engage in physical touch showed lower levels of both unextracted and extracted oxytocin. ConclusionResults are consistent with previous work showing that physical touch, particularly playful proprioceptive touch, is associated with higher oxytocin levels in fathers. These results replicate previous research using unextracted oxytocin measurement, and extend this work, showing that many but not all associations hold when using the more rigorous method of extraction when measuring oxytocin.

Fathers' Parenting and Coparenting Behavior in Dual-Earner Families: Contributions of Traditional Masculinity, Father Nurturing Role Beliefs, and Maternal Gate Closing.

We investigated whether dual-earner fathers' adherence to traditional masculine norms, father nurturing role beliefs, and maternal gate closing behavior predicted the quality of new fathers' observed parenting and coparenting behavior. Data were drawn from a longitudinal study of the transition to parenthood among 182 dual-earner different-sex couples. Expectant fathers reported their masculine agency, hostile sexism, gendered provider beliefs, and father nurturing role beliefs in the third trimester of pregnancy. Maternal gate closing behavior was coded from observations of mother-father-infant interaction at 3 months postpartum. At 9 months postpartum the quality of fathers' parenting behavior was coded from observations of father-infant interaction, and the quality of fathers' coparenting behavior was coded from observations of mother-father-infant interaction. SEM analyses indicated that fathers who held stronger father nurturing role beliefs showed more positive parenting behavior and less undermining coparenting behavior. Fathers higher in masculine agency also showed more positive parenting behavior. Mothers' greater gate closing behavior was linked to less positive parenting and less supportive coparenting behavior by fathers. More positive couple behavior observed prenatally was also associated with better parenting and coparenting by fathers. These results highlight the complexity of relations of traditional masculinity, father role beliefs, and maternal gate closing with the quality of new fathers' behaviors with children and partners in dual-earner families.

Fathers' oxytocin responses to first holding their newborns: Interactions with testosterone reactivity to predict later parenting behavior and father-infant bonds.

Little is known about human fathers' physiology near infants' births. This may represent a period during which paternal psychobiological axes are sensitive to fathers' new experiences of interacting with their newborns and that can provide insights on how individual differences in fathers' biology relate to post-partum parenting. Drawing on a sample of men in South Bend, IN (U.S.), we report results from a longitudinal study of fathers' oxytocin, cortisol, and testosterone (N=211) responses to their first holding of their infants on the day of birth and men's reported caregiving and father-infant bonding at 2-4months post-partum (N=114). First-time fathers' oxytocin was higher following first holding of their newborns, compared to their pre-holding levels. Contrasting with prior results, fathers' percentage change in oxytocin did not differ based on skin-to-skin or standard holding. Drawing on psychobiological frameworks, we modeled the interactions for oxytocin reactivity with testosterone and cortisol reactivity, respectively, in predicting father-infant outcomes months later. We found significant cross-over interactions for (oxytocin×testosterone) in predicting fathers' later post-partum involvement and bonding. Specifically, we found that fathers whose testosterone declined during holding reported greater post-partum play if their oxytocin increased, compared to fathers who experienced increases in both hormones. We also observed a similar non-significant interaction for (oxytocin×cortisol) in predicting fathers' post-partum play. Fathers whose testosterone declined during holding also reported less involvement in direct caregiving and lower father-infant bonding if their oxytocin decreased but greater direct care and bonding if their testosterone increased and oxytocin decreased. The results inform our understanding of the developmental time course of men's physiological responsiveness to father-infant interaction and its relevance to later fathering behavior and family relationships.