Cogn Ther Res DOI 10.1007/s10608-016-9823-8 ORIGINAL ARTICLE Repetitive Negative Thinking and Impaired Mother–Infant Bonding: A Longitudinal Study Dana Schmidt1 • Sabine Seehagen1,5 • Gerrit Hirschfeld2 • Silja Vocks3 Silvia Schneider1 • Tobias Teismann4 • Ó Springer Science+Business Media New York 2016 Abstract Recent theoretical models suggest that repetitive negative thinking might be a key mechanism explaining the negative effects of maternal psychopathology on mother– infant relations. While an emerging body of research largely supports this idea, the relative importance of differences in the trajectory of repetitive negative thinking during and after pregnancy for mother–infant bonding as well as maternal depressive symptoms is currently unknown. Therefore, we investigated associations between the course of maternal repetitive negative thinking during pregnancy and after birth and mother–infant-bonding and maternal depressive symptoms in a longitudinal study. The overall level of repetitive negative thinking was a significant predictor of mother–infant bonding, maternal anxiety and rejection in dealing with her infant four months after birth. Furthermore, differences in the trajectory of repetitive negative thinking predicted bonding, but not anxiety or rejection. The overall levels of repetitive negative thinking as well as the differences in the trajectory of repetitive negative thinking were significant predictors of maternal depressive symptoms. These findings indicate that changes & Dana Schmidt [email protected] 1 Department of Clinical Child and Adolescent Psychology, Ruhr-Universität Bochum, Bochum, Germany 2 Department of Economics and Social Sciences, Hochschule Osnabrück, Osnabrück, Germany 3 Department of Clinical Psychology and Psychotherapy, Universität Osnabrück, Osnabrück, Germany 4 Department of Clinical Psychology and Psychotherapy, Ruhr-Universität Bochum, Bochum, Germany 5 Present Address: The University of Waikato, Hamilton, New Zealand of repetitive negative thinking during and after pregnancy can increase the risk of postpartum depressive symptoms. Keywords Mother–infant bonding Repetitive negative thinking Pregnancy Maternal well-being Birth Introduction Repetitive negative thinking is defined as a perseverative cognitive activity that is negative in valence and experienced as difficult to control (Ehring and Watkins 2008). It has been identified as a vulnerability factor for the onset and maintenance of depressive disorders (Nolen-Hoeksema et al. 2008). The role of repetitive negative thinking in prolonging and intensifying dysphoria and depression has been empirically shown in various experimental, crosssectional and longitudinal studies—using clinical and nonclinical samples of adults, adolescents and children (NolenHoeksema et al. 2008). Moreover, experimental studies have provided evidence that repetitive negative thinking negatively biases thinking in general, impairs motivation and interferes with problem-solving (Lyubomirsky and Tkach 2004). Furthermore, repetitive negative thinking has been shown to be associated with more difficulties in interpersonal relationships (e.g., Lam et al. 2003) and diminished relationship satisfaction (Pearson et al. 2010). Tse and Bond (2004) hypothesized that repetitive negative thinking fuels social functioning difficulties by occupying cognitive resources necessary for social perception and interpersonal problem solving as well as by negatively biasing how people interpret and respond to social stimuli. With regard to the early mother–infant relationship, Stein et al. (2009) suggested that repetitive negative thinking, which they refer to as preoccupation, 123 Cogn Ther Res interferes with maternal communication by altering the attentional focus and reducing a mother’s responsiveness to her environment. As a consequence, a mother’s ability to respond sensitively to her infant’s cues and needs is thought to decrease (see also DeJong et al. 2016). Mother– infant bonding and maternal responsiveness within the mother–infant interaction are known to be of crucial importance for child development (e.g., Muzik et al. 2013; Tester-Jones et al. 2015). Therefore, Stein et al. (2009) emphasized the importance of maternal repetitive negative thinking as a risk factor for the intergenerational transmission of psychiatric disturbances and unfavorable child development. Empirical support for these ideas stems from a study by Stein et al. (2012) who tested whether an experimental manipulation of maternal repetitive negative thinking affected interactions between mothers and their 10-monthold infants. One group of participating mothers were healthy, the second group suffered from Generalized Anxiety Disorder (GAD), and the third group from Major Depressive Disorder (MDD). Mothers were randomly assigned to either receive a worry/rumination prime or a neutral prime. Their sensitivity was assessed before and after priming. Mothers suffering from GAD who were induced to engage in repetitive negative thinking showed reduced maternal responsiveness to vocalizations of their 10-month-old infants. The priming had a smaller effect on mothers suffering from MDD and a reversed effect on the behavior of healthy mothers. Thus, in mothers suffering from GAD at least, repetitive negative thinking can lead to changes in the way mothers react to their infants’ signals. However, in a recent study with dysphoric and non-dysphoric mothers, Tester-Jones et al. (2016) demonstrated that a rumination induction resulted in significant changes in mother–infant interactions compared with a control condition. Importantly, the effect of rumination on maternal sensitivity was not moderated by dysphoria. Rather, all mothers, regardless of levels of depressive symptoms, who were induced to ruminate demonstrated reduced maternal sensitivity to their infant. In a further experimental study, O’Mahen et al. (2015) found that repetitive negative thinking can compromise parenting skills: Depressive mothers of infants aged up to 12 months who were induced to engage in repetitive negative thinking exhibited poorer parental problem-solving effectiveness and poorer problem-solving confidence compared to depressed mothers who were induced to distract from troubled thoughts. Tester-Jones et al. (2015) found repetitive negative thinking to moderate the association between postpartum depressive symptoms and maternal self-reported responsiveness—in mothers with infants low in negative temperament. For mothers of infants high in negative temperament, postpartum depressive symptoms were 123 directly related to poorer self-reported responsiveness. In a small-scale longitudinal study, Müller et al. (2013) could show that repetitive negative thinking towards the end of pregnancy was associated with a reduction in self-reported mother–infant bonding 5 weeks postpartum. Women who scored high on repetitive negative thinking during the second to third trimester of their pregnancy felt more distant from their infant and were more discontent with having a child. Furthermore, they reported more anxious feelings and uncertainties in dealing with their child. Taken together, an emerging body of research supports the assumption that repetitive negative thinking interferes with parenting skills and may thus hamper the development of mother– infant bonding (DeJong et al. 2016; Stein et al. 2009). Potentially, this process already begins during pregnancy (Dubber et al. 2014). The emergence of mother–foetal bonding is the result of active cognitive and emotional engagement with the pregnancy in an expectant mother (Gloger-Tippelt 1988). In line with this reasoning, Schmidt et al. (2016) found that repetitive negative thinking in the first trimester of pregnancy predicted negative mother– foetus attachment in the third trimester. Disturbed antenatal attachment could, in turn, reduce the quality of mother– infant interactions after birth (Shin et al. 2006; Siddiqui and Hägglöf 2000). However, further longitudinal studies are needed to clarify whether the overall level of repetitive negative thinking as well as differences in the trajectory of repetitive negative thinking during pregnancy predict later mother– infant bonding. Repetitive negative thinking is a tendency that has been shown to be relatively constant over time (e.g., Bagby et al. 2004). However, the transition to motherhood is a challenging time involving many psychological and physical changes. It may thus well be that the intensity of repetitive negative thinking changes during pregnancy and after birth, resulting in differences in the trajectory of repetitive negative thinking between women. It has not yet been empirically examined whether the intensity of repetitive negative thinking during and after pregnancy might increase or decrease and, if the course varies between women, whether any differences in the trajectory are predictive of difficulties in the emerging mother–infant bond. In addition to clarifying the predictive value of repetitive negative thinking for mother–infant bonding, a second unresolved issue is to determine the significance of repetitive negative thinking as a predictor for the development of postpartum depressive symptoms. It has been repeatedly shown that during the time of pregnancy and childbirth women are at an increased risk of developing depression (Philipps and O’Hara 1991), with an estimated 13% of women meeting criteria for MDD in the first 3 months postpartum (Howard et al. 2014). Although the effect of repetitive negative thinking on the onset and Cogn Ther Res maintenance of depression is well-documented (Nolen-Hoeksema et al. 2008), the relevance of repetitive negative thinking for postnatal depressive symptoms is less clear. In an initial study, Barnum et al. (2013) found repetitive negative thinking during the third trimester of pregnancy to be predictive of postpartum depressive symptoms 2 months after birth, but not 1 month after birth. Yet, in another study, repetitive negative thinking during the second and third trimester of pregnancy was not predictive of depressive symptoms within 8 weeks after birth (Müller et al. 2013). Likewise, Raes et al. (2014) did not find a predictive association between repetitive negative thinking during pregnancy and maternal depression 12 and 24 weeks after birth. Differences in the assessment of depressive symptoms and repetitive negative thinking as well as varying measurement points may account for these diverging results. Furthermore, the studies were limited in their explanatory power in that two studies (Barnum et al. 2013; Müller et al. 2013) used rather small samples and repetitive negative thinking was only assessed once during pregnancy in all three studies. Studies with larger samples and multiple assessments of maternal well-being and mothers’ tendency to engage in repetitive negative thinking are required to estimate the predictive value of the overall level of repetitive negative thinking versus differences in the trajectory of repetitive negative thinking on maternal postpartum depressive symptoms. Purpose of the Present Study The aim of the present study was to determine if the overall level of maternal repetitive negative thinking and differences in the trajectory of maternal repetitive negative thinking predict (1) self-reported mother–infant bonding and (2) the development of maternal depressive symptoms after pregnancy in a non-clinical sample. On the basis of the literature described above, we assumed that the overall level as well as differences in the trajectory (i.e., the development over time) of maternal repetitive negative thinking would predict mother–infant bonding as well as maternal depressive symptoms. questionnaires were mailed to participants’ homes (51.6%) or were completed online (48.4%). Participation was voluntary and there was no monetary compensation. The initial sample consisted of 246 women (age: M = 29.86, SD = 4.54 years, age range 20–45 years, 100% Caucasian). Of the initial 246 women, n = 46 women (18.69%) terminated participation either after the first (n = 21), second (n = 5) or third assessment (n = 20). A further n = 16 women completed\70% of all questionnaire items and were excluded on the grounds of incomplete datasets. Thus, the final sample consisted of N = 184 women (age: M = 30.02, SD = 4.60 years; age range 20–45). On average, participants completed the first assessment during the 13th week of pregnancy (M = 13.66, SD = 3.09), the second assessment in the 26th week of pregnancy (M = 25.62, SD = 5.05), the third assessment 5 weeks after birth (M = 4.88, SD = 2.94) and the fourth assessment 16 weeks after birth (M = 15.53, SD = 6.68). Table 1 illustrates sociodemographic characteristics of the study sample. Design Each participant was assessed four times (see above): All participants gave informed consent prior to their inclusion in the study. The study was approved by the Ethics Committee of the Faculty of Psychology, Ruhr-Universität Bochum, Germany. Measures Perseverative Thinking Questionnaire (PTQ; Ehring et al. 2011) The PTQ is a German 15-item self-report measure designed to assess repetitive negative thinking which is Table 1 Social demography Family status Method Participants Minimum age for participation was 18 years. All participants were required to speak German and had to be within the first 14 weeks of pregnancy when included in the study. There were no inclusion criteria with regards to diagnostic status. That is, pregnant women could participate regardless of whether they suffered from mental health problems. Participants were recruited via advertisements in magazines, medical practices, and via the Internet. The Married Stable relationship 114 (62.0%) 64 (34.8%) Single 3 (1.6%) Others 3 (1.6%) Years of education [10 years 168 (91.4%) \10 years 14 (7.6%) Other 2 (1.1%) Number of children First child 97 (52.7%) At least one child 58 (34.5%) No information 10 (5.4%) 123 Cogn Ther Res perceived as pervasive, unproductive and capturing mental capacity (e.g., ‘‘The same thoughts keep going through my mind again and again’’). All items are to be answered on a 5-point scale ranging from 0 (‘‘never’’) to 4 (‘‘almost always’’). The questionnaire has a good internal consistency (Cronbach’s a): a = 0.95 (Ehring et al. 2011). In accordance, internal consistency was good in the present sample: a = 0.95. Edinburgh Postnatal Depression Scale (EPDS; Cox et al. 1987; German version: Bergant et al. 1998) The EPDS is a 10-item self-report scale designed to measure maternal distress and depressive mood during the previous 7 days and has been used for assessments before (Murray and Cox 1990) and after (Cox et al. 1987) childbirth (e.g., ‘‘I have been able to laugh and see the funny side of things’’). The scale assesses common depressive symptoms but omits somatic symptoms that can occur (independently from depression) in the context of pregnancy and during the postpartum period (e.g., change in appetite or sleep). Each item is answered on a 4-point scale ranging from 0 to 3. A score C13 is indicative of a depressive state (Bergant et al. 1998). In a German population the internal consistency was 0.81 (Bergant et al. 1998). Accordingly, the internal consistency in the present sample was good: a = 0.85. Postpartum Bonding Questionnaire (PBQ; Brockington et al. 2001; German version: Reck et al. 2006) The PBQ is a 25-item self-rating instrument designed to provide an early indication of difficulties in the mother– infant relationship. The PBQ consists of four scales, and each item is answered on a 6-point scale (from 0 = ‘‘never’’ to 5 = ‘‘always’’): impaired bonding (12 items; e.g., ‘‘I feel distant from my baby’’), rejection and anger (7 items; e.g., ‘‘My baby annoys me’’), anxiety about care (4 items; e.g., ‘‘I am afraid of my baby’’) and risk of abuse (2 items; e.g., ‘‘I have done harmful things to my baby’’). A higher score indicates more pathological responses. As all participating mothers rated 0 (‘‘never’’) on both items of the scale ‘‘risk of abuse’’, this subscale was excluded from further analysis. Cronbach’s a estimates were mixed in a sample of German inpatients of delivery units (Reck et al. 2006): impaired bonding a = 0.78, rejection and anger a = 0.68 and anxiety about care a = 0.34. The internal consistencies of the subscales in the current sample were modest as well: impaired bonding a = 0.80, rejection and anger a = 0.79 and anxiety about care: a = 0.56. 123 Social Support Scale (F-SozU-K-14; Fydrich et al. 2007) The F-SozU-K-14, a German questionnaire, was used to assess social support. This questionnaire includes 14 items about emotional support, instrumental support and social integration (e.g., ‘‘I often feel I am an outsider’’). Participants score their agreement on a scale from 1 (‘‘that does not apply to me’’) to 5 (‘‘that exactly applies to me’’). High values indicate higher levels of perceived social support. The F-SozU-K-14 has shown good internal consistency of a = 0.94 in a German population (Fydrich et al. 2009). Internal consistency in the current sample was good as well with a = 0.94. Statistical Analyses Demographic data were summarized using descriptive statistics. The predictive value of repetitive negative thinking for postpartum depression and bonding was analyzed using a latent growth curve (LGC) model (Fig. 1) which allowed disentangling the individual differences in the overall level of repetitive negative thinking—as estimated by the intercept—from differences in the trajectory of repetitive negative thinking—as estimated by the slope. The question of interest was whether intercept and slope could be used as predictors of postpartum bonding and depression. Furthermore, we sought to test whether maternal age, baseline antenatal depression and social support were significant predictors of the intercept and the slope. Overall model fit was assessed using v2 as a measure of absolute fit, and Comparative Fit Index (CFI), TuckerLewis Index (TLI), and Root Mean Squared Error of Approximation (RMSEA) as relative fit indices. Model fit was deemed good if CFI [ 0.95, TLI [ 0.9 and RMSEA \ 0.08 (Hu and Bentler 1999). One hundred and eighty-four complete datasets were used to fit the LGC model. Descriptive data analysis was performed using IBM SPSS Statistics 22, the LGC model was fit using R and the lavaan package (Rosseel 2012). Results Descriptive Statistics Mean and standard deviations of all study variables are reported in Table 2. Shape and Predictors of Trajectories in Repetitive Negative Thinking The overall fit of the LGC model was good (v2 = 36.283, CFI = 0.98, TLI = 0.96, RMSEA = 0.067 (95% CI Cogn Ther Res Fig. 1 Overview of latent growth curve (LGC) model negative thinking. The mean of the latent slope was -1.97 (95% CI -2.24 to -1.69), indicating an overall decrease in repetitive negative thinking across the four time-points. Only n = 20 (11%) participants showed a positive slope variable that is, an increase in repetitive negative thinking. Several variables were related to the overall level and trajectory of repetitive negative thinking; the intercept was higher for participants with elevated levels of baseline antenatal depressive symptoms (est = 0.59, p \ 0.001) and lower for high levels of social support (est = -0.21, p \ 0.01). 0.029–0.101), indicating that the model parameters could be used to test hypotheses about the relation between constructs. In order to test for non-linear effects, we also specified a model with a quadratic growth-term. This resulted in a slightly larger misfit as measured by BIC (BIC = 12429 for the linear model, vs. BIC = 12432 for the quadratic model) so that the final model only contained a linear slope. This was also corroborated by the means over the different time-points (Fig. 2). The mean of the latent intercept was 20.88 (95% CI 19.51–22.25), indicating a moderate level of repetitive Table 2 Descriptive and change statistics (N = 184) Variable T1 (during the first 4 months of pregnancy) T2 (during the second half of pregnancy) T3 (during the 3rd and 6th week after calculated due date) T4 (during the 3rd and 4th month after calculated due date) M M M M SD SD SD SD Edinburgh Postnatal Depression Scale 5.99 4.76 5.78 4.88 6.68 4.64 5.24 4.73 Perseverative Thinking Questionnaire Social Support Scale-Short Version 21.03 62.83 11.66 8.77 18.60 62.20 12.78 9.98 16.88 63.09 12.35 8.50 15.04 63.08 11.95 8.99 Bonding Subscale of the Postpartum Bonding Questionnaire 6.11 5.47 5.72 5.87 Rejection/Anger Subscale of the Postpartum Bonding Questionnaire 2.35 3.09 2.12 3.07 Anxiety Subscale of the Postpartum Bonding Questionnaire 2.59 1.90 2.01 1.94 123 Cogn Ther Res dealing with the infant, and maternal depressive symptoms after birth. Also, the trajectory (increase vs. decrease) of repetitive negative thinking as measured by the slope variable predicted higher levels of postpartum depressive symptoms (est = 0.60, p \ 0.001) and impaired bonding (est = 0.21, p \ 0.04), indicating that an increase in repetitive negative thinking during pregnancy was prospectively associated with more depression and impaired bonding. Discussion Fig. 2 Trajectories of repetitive negative thinking. Note: Error bars indicate 95% confidence intervals. Dotted line indicate the linear trajectory from the LGC model Prediction of Depression and Bonding 3–4 Months After Birth Overall, the model was able to account for 65% of the variance in depression scores 3–4 months after birth, but only between 14 and 18% of the variance in the three bonding scales. The individual estimates effects are given in Table 2. Of the baseline-covariates, only higher levels of perceived social support and antenatal depression were significantly related to postpartum bonding and depressive symptoms. Baseline antenatal depressive symptoms were negatively associated with bonding (est = -0.22, p \ 0.05), indicating that low levels of baseline antenatal depressive symptoms were predictive of impaired bonding. Furthermore, baseline antenatal depressive symptoms were positively (est = 0.38, p \ 0.001) and baseline social support negatively (est = -0.139, p \ 0.04) correlated to postpartum depressive symptoms. In addition, baseline social support was negatively related to the rejection/anger subscale of the PBQ (est = -0.26, p \ 0.001) and the anxiety subscale (est = 0.12, p \ 0.035), indicating that low social support was predictive of increased maternal anxiety in dealing with the child and rejection/anger towards the child after birth (Table 3). In addition, we found that the overall level of repetitive negative thinking was related to all aspects of bonding and depression. Specifically, the overall level was related to impaired bonding (est = 0.44, p \ 0.001), maternal anxiety in dealing with the infant (est = 0.33, p \ 0.01) and rejection (est = 0.25, p \ 0.03), as well as postpartum depression (est = 0.27, p \ 0.003), indicating that repetitive negative thinking during pregnancy was predictive of impaired mother–infant bonding, maternal anxiety in 123 The aim of the present study was to determine if the overall level of maternal repetitive negative thinking and the trajectory of maternal repetitive negative thinking predict (1) self-reported mother–infant bonding and (2) the development of maternal depressive symptoms after pregnancy in a community sample. There were three main findings: first, the overall level of repetitive negative thinking was a significant predictor of mother–reported impairments in mother–infant bonding and of maternal anxiety and rejection in the mother–infant relationship. Specifically, women who reported high overall levels of repetitive negative thinking had higher scores on the bonding scale, that is, they felt less close to their infant and were less likely to report being content with having a child. In addition, they reported feeling more anxious in dealing with their infants. Second, differences in the trajectory of repetitive negative thinking were also predictive of mother–reported impairments in mother–infant bonding. Specifically, an increase in repetitive negative thinking during pregnancy was an additional predictor of impairments in mother–infant bonding. Third, both the overall level of repetitive negative thinking and an increase of repetitive negative thinking during pregnancy were predictive of postpartum depressive symptoms. As expected and in line with prior research (Müller et al. 2013; Schmidt et al. 2016; Stein et al. 2012; Tester-Jones et al. 2015), high levels of repetitive negative thinking were associated with difficulties in maternal perceptions of the mother–infant relationship. Repetitive negative thinking has been shown to be associated with negatively biased thinking (Spasojevic et al. 2001), reduced self-esteem (Ciesla and Roberts 2002), intolerance of uncertainty (Yook et al. 2010) and with a lack of interpersonal problem solving skills (Lyubomirsky et al. 1999). These problems might contribute to mothers’ perceived difficulties in dealing with the new life situation after birth, coping with the presence of their newborn, and with feeling confident caring for their child. Furthermore, it is likely that repetitive negative thinking leads mothers to focus their attention more towards their own thoughts instead of focusing on the Cogn Ther Res Table 3 Overview of regression parameters Criterion Predictor Intercept (T1–T4) Antenatal depression (T1) Slope (T1–T4) Postpartum depression (T4) 0.592 <0.001 -0.035 0.589 Support (T1) 20.208 0.004 Antenatal depression (T1) -0.212 0.07 Age (T1) 0.069 0.51 Support (T1) 0.018 0.877 Intercept (T1–T4) 0.272 0.003 Slope (T1–T4) 0.596 <0.001 0.379 <0.001 Age (T1) -0.03 Support (T1) 20.139 Intercept (T1–T4) Slope (T1–T4) PBQ-rejection/anger (T4) 0.607 0.04 0.435 <0.001 0.21 0.042 Antenatal depression (T1) 20.216 0.05 Age (T1) Support (T1) -0.009 -0.131 0.891 0.101 Intercept (T1–T4) 0.253 0.034 Slope (T1–T4) 0.161 Antenatal depression (T1) Age (T1) PBQ-anxiety (T4) p value Age (T1) Antenatal depression (T1) PBQ-bonding (T4) Parameter estimate -0.134 0.026 0.122 0.23 0.71 Support (T1–T4) 20.262 0.001 Intercept (T1–T4) 0.33 0.006 Slope (T1–T4) 0.093 0.368 -0.117 0.298 Age (T1) -0.023 0.746 Support (T1) 20.173 0.035 Antenatal depression (T1) A two-sided p-value less than 0.05 was considered significant PBQ, Postpartum Bonding Questionnaire; T1, evaluation during the first 4 months of pregnancy; T2, evaluation during the second half of pregnancy; T3, evaluation an average of 5 weeks after birth; T4, evaluation an average of 16 weeks after birth needs of their infant which can lead to reduced responsiveness to the infant (cf. DeJong et al. 2016; Stein et al. 2009). These assumptions primarily refer to interactions between mother and child after birth. However, there are reasons to believe that the mother–child relationship already emerges during pregnancy. According to GlogerTippelt (1988), the development of mother–foetal bonding can be described as an active cognitive and emotional accomplishment of a pregnant woman. An expecting mother is thought to develop a schema which results from attributing characteristic traits to her unborn child. This assignment of characteristics is based on information about and experiences with the unborn child. Thereby, expectant mothers create a mental image of their growing child which strengthens mother–foetal bonding. It is possible that persistently high levels of repetitive negative thinking during pregnancy interfere with prenatal bonding processes by preventing expectant mothers from focusing on their unborn child (cf. Schmidt et al. 2016). Such early disruptions might help explain the negative associations between repetitive negative thinking and impaired postpartum bonding observed in the present study. Likewise, the trajectory of maternal repetitive negative thinking was predictive of mother–infant bonding. Specifically, an increase of repetitive negative thinking over time was associated with impaired postpartum bonding (measured by the PBQ ‘‘Bonding’’ scale). In contrast, there were no associations between an increase of repetitive negative thinking and rejection/anger as well as anxiety in dealing with the child. High values on these two scales indicate potentially more severe difficulties in mother–infant bonding than high values on the scale ‘‘Bonding’’. Only consistently high levels of repetitive negative thinking predicted high scores on these two scales. In line with our expectations, both the overall level of repetitive negative thinking and differences in the trajectory of repetitive negative thinking were predictive of postpartum depressive symptoms. Both mothers who exhibited constantly high levels of repetitive thinking and mothers whose tendency to think repetitively and 123 Cogn Ther Res negatively increased over time experienced more depressive symptoms after birth. This finding extends recent study results on the role of cognitive factors for the emergence of postpartum psychopathology (Barnum et al. 2013). However, this result differs from the findings by Müller et al. (2013) as well as by Raes et al. (2014) that indicated no association between repetitive negative thinking and postpartum depressive symptoms. These diverging results might be due to different measuring points as well as varying measuring instruments used in the two studies. Müller et al. (2013) used the BDI-II (Beck et al. 1996) to measure depressive symptoms whereas the majority of studies, including the present one, used the EPDS (Cox et al. 1987). The EPDS is considered more appropriate for the assessment of depression in pregnancy and around childbirth than the BDI-II, as the EPDS does not assess physical symptoms of depression, except for one item measuring sleep difficulties. This adjustment helps to avoid attributing physical changes that could be due to pregnancy (e.g., changes in appetite) to depressive symptoms. Limitations The current study identified some relevant, and hitherto unknown, links between repetitive negative thinking and impaired mother–infant bonding in a longitudinal manner. However, it should be noted that the findings are solely based on self-report measures on repetitive negative thinking, maternal depression, and mother–infant bonding. There is some evidence that a mother’s perception of her bond to her child corresponds with observable mother– infant interactions (e.g., Hornstein et al. 2006). However, on the basis of the self-reports alone, caution should be exercised drawing conclusions regarding the relationship between mother and child as well as maternal skills (Hornstein et al. 2006; Noorlander et al. 2008). Since ours is the first larger study of its kind, self-report measures were chosen on the basis of cost-benefit considerations and general feasibility. In the next step, further studies could use more objective and complex methods such as behavioral measures of mother–infant interactions or a multiinformant approach in order to verify this association. A second limitation of this study is the homogeneity of study participants with respect to their socio-economic status and cultural background. All participating women were Caucasian and most had completed at least 13 years of education. It is possible that the findings will not generalize to mothers from different cultural and socioeconomic backgrounds. Third, we did not assess whether the participants’ pregnancies were planned/wanted. This aspect could be of interest for future studies. Conceiving an unplanned child 123 might be a cause for repetitive negative thinking during pregnancy as well as for impaired mother–infant bonding. Fourth, the results should be treated with caution because of the low variation in scores of repetitive negative thinking over time, and in trajectories between individuals. Relatedly, relatively low levels of depression and impaired bonding are a limitation. This may limit the generalizability of these findings to other populations, particularly clinical samples. Conclusion To our knowledge, this is the first study that includes several measuring points during and after pregnancy with the aim of identifying the relative importance of stable versus changing patterns of repetitive negative thinking for maternal well-being and mother–infant bonding. The associations found in this study indicate that supporting pregnant women to manage and modify their thoughts might be a promising avenue to help prevent impairments in maternal well-being and mother–infant bonding. Specific interventions aimed at changing thought patterns could be used to this end (Duncan and Bardacke 2010). Mindfulness-based interventions as well as psychoeducation on the role of perseverative thinking could easily be incorporated into prenatal classes. Women who suffer from high levels of habitual perseverative thinking should furthermore be informed by their midwife or their gynaecologist about the benefits of cognitive-behavioral therapy (CBT) for perinatal distress (Wenzel and Kleiman 2015). Important components of CBT for perinatal distress include increasing behavioral activation, facilitating the acquisition of problem solving skills, and enhancing decisions making and communication skills. A further module is the promotion of healthy sleep. This topic might be of particular interest to pregnant women who often have difficulties finding a comfortable sleeping position, and for postpartum women who are likely to get up multiple times a night to care for their newborn (Wenzel and Kleiman 2015). Yet another major focus is on overcoming interpersonal difficulties with partners, friends and family members. Our findings suggest that it would be beneficial to offer such interventions to pregnant women experiencing elevated levels of perseverative thinking as well as symptoms of stress, anxiety, and depression early during pregnancy in order to promote maternal well-being and the development of a positive mother–infant relationship. Acknowledgements The authors would like to thank all the women who participated in this study. Thank you to Lisa Kösters for help with data collection and data entry. Cogn Ther Res Funding This study was funded by a Grant from the German Research Foundation, Deutsche Forschungsgemeinschaft (DFG) to Sabine Seehagen (2154/4-1) and Tobias Teismann (TE747/2-1). Compliance with Ethical Standards Conflict of Interest Dana Schmidt, Sabine Seehagen, Gerrit Hirschfeld, Silja Vocks, Silvia Schneider and Tobias Teismann declare that they have no conflict of interest. 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