Anxiety in fathers in the perinatal period: A systematic review

Non-pharmacological interventions to reduce anxiety in pregnancy, labour and postpartum: A systematic review

BACKGROUND

The anxiety mothers experience during pregnancy is well known and may have negative consequences for the emotional, psychological, and social development of newborns. Anxiety must therefore be reduced using different strategies.

OBJECTIVE

To determine published non-pharmacological interventions to reduce anxiety during pregnancy, childbirth and postpartum.

METHODS

A systematic peer-review of experimental and quasi-experimental studies was conducted using the PubMed, Scopus, Web of Science (WOS), and CINAHL databases. The quality of the studies was assessed using the Spanish version of the PEDro scale. Two researchers participated independently in the data selection and extraction process.

FINDINGS

587 articles were identified, of which 21 met the eligibility criteria. In eleven studies the intervention was performed during pregnancy, in three of them during labour, in four of them during the postpartum period, and in three of them during pregnancy and postpartum. During pregnancy, the most effective interventions were behavioural activation, cognitive behavioural therapy, yoga, music therapy, and relaxation; during childbirth: aromatherapy; during pregnancy and postpartum: antenatal training, massage by partners, and self-guided book reading with professional telephone assistance.

CONCLUSION AND IMPLICATIONS

The most effective interventions to reduce anxiety were performed either during pregnancy or during the postpartum period, not during labour. Most of the interventions were performed on the women, with few of them being performed on both partners. Non-pharmacological interventions may be applied by nurses and midwives to reduce anxiety during pregnancy, labour and postpartum.

Distress in fathers of babies with infant colic

AIM

The aim of this case-control study was to compare parental stress, depression, anxiety and bonding problems between fathers and mothers of babies with infant colic and parents of control infants.

METHODS

Parents of 34 infants with infant colic and 67 control dyads were included. Parental feelings were assessed using validated questionnaires.

RESULTS

Fathers as well as mothers of infants with infant colic showed significantly higher mean scores compared with controls on stress (20.9 ± 5.8 and 25.5 ± 7.2 vs 16.4 ± 6.1 and 14.7 ± 7.0), depression (5.6 ± 4.0 and 9.1 ± 4.8 vs 2.9 ± 2.9 and 4.0 ± 3.1), anxiety (41.9 ± 9.2 and 46.0 ± 10.2 vs 32.4 ± 8.4 and 32.2 ± 9.3) and bonding problems (16.1 ± 8.1 and 13.7 ± 5.9 vs 8.7 ± 6.3 and 5.0 ± 4.4). In fathers, after adjustments for infant and parental confounders and maternal negative feelings, depression and anxiety were significantly increased in the infant colic group (difference of 2.7 (p = 0.017) and 8.6 (p = 0.002)).

CONCLUSION

In fathers of infants with infant colic, the experienced distress is strongly associated with maternal distress, except for depression and anxiety. Paediatricians should be aware of these paternal feelings as parental reassurance and support is one of the cornerstones in the treatment of infants with colic.

Examining the Effectiveness of the Fathers and Babies Intervention: A Pilot Study

There is increasing recognition of the importance of addressing the mental health of fathers, including during the perinatal period. Fathers exhibiting mental health concerns during the perinatal period are at heightened risk for future negative mental health outcomes and are less likely to engage in nurturing relationships with their children, leading to a sequalae of negative child outcomes during infancy and into adolescence. Although interventions have been developed for perinatal fathers, they typically do not focus directly on addressing paternal mental health. To fill this gap, we developed the Fathers and Babies intervention to be delivered to perinatal fathers whose partners (mothers) were enrolled in home visiting programs. A pre-post longitudinal study was conducted in which 30 father-mother dyads were recruited from home visiting programs. Fathers received the 12-session Fathers and Babies intervention while the mother concurrently received the Mothers and Babies intervention delivered to her by a home visitor. Baseline, 3- and 6-month self-report surveys were conducted with both fathers and mothers. Fathers and mothers had statistically significant decreases in perceived stress between baseline and both follow-up time points, with moderate effect sizes generated for both sexes. No statistically significant differences were found for depressive symptoms, anxiety symptoms, or perceived partner support, although we found small effects for reductions in depressive symptoms among fathers, as well as increases in the percentage of fathers and mothers who reported high levels of emotional and instrumental support post-intervention. While preliminary, these findings suggest the potential for Fathers and Babies to positively impact the mental health of fathers in the perinatal period, and also signal the viability of home visiting as a setting for delivering this intervention. Future research should employ a comparison group to generate stronger evidence of intervention effectiveness and include measurement of dyadic relationships and paternal parenting practices.

Fathers' Experience of Perinatal Obsessive-Compulsive Symptoms: A Systematic Literature Review

Perinatal Obsessive-Compulsive Disorder (pOCD) refers to the onset/exacerbation of Obsessive-Compulsive Disorder (OCD) during the perinatal period. This disorder has been studied in mothers, with limited research conducted on fathers. The aim of the current study was to conduct the first systematic review of research investigating the experience of pOCD in fathers. A systematic review was conducted via electronic searches of Scopus, ProQuest, APA PsychNet, PubMed, and EBSCOhost. There were 523 articles identified and screened for eligibility, resulting in six eligible studies included in the final review. All studies reported the presence of subclinical obsessive-compulsive symptoms in fathers during the perinatal period, with the prevalence comparable to mothers. Compared to mothers, however, fathers were found to report less intrusion-related distress. Two studies reported a correlation between dysfunctional beliefs, negative appraisal of intrusions, and pOCD symptoms. Common categories of obsessive thoughts and compulsions experienced by fathers were also identified. Fathers appear susceptible to pOCD, which is consistent with the Cognitive-Behavioral Theory of OCD. Future research is recommended, therefore, to investigate clinical prevalence and severity of pOCD in fathers, particularly relative to mothers, and further investigate the role of dysfunctional beliefs in the development of pOCD.

A Review of the Involvement of Partners and Family Members in Psychosocial Interventions for Supporting Women at Risk of or Experiencing Perinatal Depression and Anxiety

A maternal experience of perinatal mental health conditions can have serious short- and long-term consequences for child development and family relationships. Women with perinatal depression and/or anxiety are primarily supported by their partner/spouse and family. The aim of this review was to synthesise data from studies that have examined the inclusion of partners or family members in psychosocial interventions for women at risk of or experiencing perinatal depression and/or anxiety. A systematic search of five databases was conducted to identify literature published between 2010 and 2020. Nine empirical studies met the eligibility criteria and were independently assessed by two authors using the National Heart, Lung and Blood Institute Quality Assessment Tools and data were extracted and narratively synthesised guided by TIDieR (Template for Intervention Description and Replication) checklist. Eligible studies detailed diverse interventions facilitated by a variety of programme facilitators, with no central model of intervention or study outcome measures evident across the studies. All studies except one reported a significant change in maternal depression and anxiety scores. The interventions had limited evaluation of the woman’s, partner’s or family member’s experiences of involvement in the intervention. Further research is required to firmly establish the effectiveness of co-designed interventions to support the sustainable integration of such interventions into routine perinatal mental health services.

Grief and Bereavement in Fathers After the Death of a Child: A Systematic Review

CONTEXT

The death of a child is devastating, and complicated grief adversely impacts parental physical and psychosocial well-being. Most research currently is centered on bereaved mothers, and the experiences of fathers remains underexplored.

OBJECTIVE

We systematically reviewed the literature to characterize the grief and bereavement experiences of fathers after the death of a child.

DATA SOURCES

We searched Medline, PsycInfo, Embase, and Cumulative Index to Nursing and Allied Health Literature using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.

STUDY SELECTION

Inclusion criteria encompassed English language articles published between 2007 and 2019 that evaluated the grief and bereavement experiences of fathers after the death of their child. We excluded studies describing paternal bereavement after the death of a child aged older than 21 years, stillbirth, miscarriage, or studies that did not specify age of death.

DATA EXTRACTION

Extracted domains included study design, demographics, findings, and quality assessment.

RESULTS

We screened 1848 deduplicated titles and abstracts and 139 full articles, yielding 21 articles for inclusion in this analysis. Fathers often avoided discussing their grief with others, returned to work earlier, and used goal-oriented tasks as coping strategies. Intense grief reactions and posttraumatic psychological sequelae diminished over time in mothers yet persisted in fathers.

LIMITATIONS

Included studies were primarily descriptive in nature, without ability to ascertain causality. Limited paternal data exists in the literature compared with maternal data.

CONCLUSIONS

Despite evolving gender roles, many fathers navigate loss through stoicism, self-isolation, and hard work. For some fathers, these coping mechanisms may be inadequate for navigating grief.

Expectant fathers' experiences of family-centred births in Estonia: a qualitative study

OBJECTIVE

One of the aims of family-centred care is to provide expectant fathers with positive experiences during childbirth, so they can support their partners and bond with their new baby. However, research in this area has been limited. This study described men´s experiences with family-centred births in Estonia, Northern Europe.

DESIGN

Qualitative study with open-ended interviews that were audio taped and analysed by inductive content analysis by Elo and Kyngäs (2008).

SETTING

Birth units at one central and one regional hospital in Estonia.

PARTICIPANTS

Twelve Estonian fathers aged 22-44, interviewed 4-12 weeks after their baby's birth.

KEY CONCLUSIONS

Fathers' experiences of family-centred care during their baby's birth focused on their transition to fatherhood, their experiences of birth as a multifactorial life event and the experiences they shared with other fathers. They discussed supporting their partners during the birth, their involvement in decision making, the attitudes of healthcare professionals and how their role in the family changed. The fathers said that the birth was a private and public event, where their own role, and the roles of healthcare professionals, were confusing. This made family-centred care difficult during the birth. Sharing experiences with other fathers decreased their fears and increased their understanding of becoming fathers. Some fathers were not ready for fatherhood and midwives needed to assess how involved fathers wanted to get during the birth.

IMPLICATIONS FOR PRACTICE

Family-centred care is important during birth, but more research is needed into how fathers see their role. The roles played by medical staff also need to be clearer. Better knowledge about what fathers expect and need, can help midwives to involve and support them at a level they feel comfortable with. Peer support can play a vital role in preparing fathers for birth and fatherhood.

Mental Health Trajectories of Fathers Following Very Preterm Birth: Associations With Parenting

OBJECTIVE

Mothers of infants born very preterm (VPT) are at high risk of mental health difficulties. However, less is known about the course of fathers' depressive and anxiety symptoms over time, and the implications this may have for early parenting behaviors.

METHODS

In total, 100 fathers of 125 infants born VPT (<30 weeks' gestation) completed questionnaires assessing depressive and anxiety symptoms shortly after their infant's birth, and when their infant reached term-equivalent age, 3 months, 6 months, and 12 months' corrected age. At 12 months' corrected age, fathers' parenting behaviors were assessed using the Emotional Availability Scales. Longitudinal latent class analysis was used to identify trajectories of fathers' depressive and anxiety symptoms, and linear regression equations examined relationships between these trajectories and fathers' parenting behaviors.

RESULTS

For both depressive and anxiety symptoms, two distinct trajectories were identified. For depression, most fathers were assigned to the persistently low symptom trajectory (82%), while the remainder were assigned to the persistently high symptom trajectory (18%). For anxiety, 49% of fathers were assigned to the persistently low symptom trajectory, while 51% were assigned to the trajectory characterized by moderate symptoms over the first postnatal year. There were no significant differences in parenting behaviors between fathers assigned to the different depressive and anxiety symptom trajectories.

CONCLUSIONS

Fathers of infants born VPT are at risk of chronic depressive and anxiety symptoms over the first postnatal year, highlighting the need for screening and ongoing support.

Pregnant under the pressure of a pandemic: a large-scale longitudinal survey before and during the COVID-19 outbreak

BACKGROUND

One of the groups that is most vulnerable to the COVID-19 pandemic is pregnant women. They cannot choose to refrain from care; they and their children are at risk of severe complications related to the virus; and they lose comfort and support as clinics prohibit their partners and as societal restrictions demand isolation from friends and relatives. It is urgent to study how this group is faring during the pandemic and we focus here on their health-related worries.

METHODS

A longitudinal survey at a Swedish hospital starting 6 months before (16 September 2019) and continuing during the COVID-19 outbreak (until 25 August 2020). A total of 6941 pregnant women and partners of diverse social backgrounds were recruited. Ninety-six percent of birth-giving women in the city take early ultrasounds where recruitment took place. Sixty-two percent of the women with an appointment and fifty-one percent of all partners gave consent to participate.

RESULTS

Pregnant women experienced dramatically increased worries for their own health, as well as for their partner's and their child's health in the beginning of the pandemic. The worries remained at higher than usual levels throughout the pandemic. Similar, but less dramatic changes were seen among partners.

CONCLUSIONS

There is a need for heightened awareness of pregnant women's and partners' health-related worries as a consequence of the COVID-19 pandemic. Related feelings, such as anxiety, have been linked to adverse pregnancy outcome and might have long-term effects. The healthcare system needs to prepare for follow-up visits with these families.

The Paternal Experience of Fear of Childbirth: An Integrative Review

BACKGROUND

It is estimated that approximately 13% of expectant fathers experience a pathological and debilitating fear of childbirth.

OBJECTIVE

The aim of this integrative review was to examine and synthesise the current body of research relating to paternal experience of fear of childbirth.

METHODS

A systematic literature search of five databases-CINAHL, Cochrane Library, MEDLINE, PsycArticles and PsycInfo-identified seventeen papers. Methodological quality of studies was assessed using the Crowe Critical Appraisal Tool.

RESULTS

Thematic data analysis identified three themes: the focus of fathers' childbirth-related fears, the impact of fear of childbirth on health and wellbeing, and fear of childbirth as a private burden.

DISCUSSION

Fear of childbirth is a significant and distressing experience for expectant fathers who may benefit from an opportunity to express their childbirth-related fears in an environment where they feel validated and supported. Antenatal education is recommended to enhance fathers' childbirth-related self-efficacy to reduce fear of childbirth.

CONCLUSIONS

Fear of childbirth may negatively impact the lives of men and consequently their families. Further investigation into methods and models for identifying and supporting men at risk of or experiencing fear of childbirth is required to improve outcomes for this population of men.

Fidelity of Interventions to Reduce or Prevent Stress and/or Anxiety from Pregnancy up to Two Years Postpartum: A Systematic Review

INTRODUCTION

Intervention fidelity refers to whether an intervention is delivered as intended and can enhance interpretation of trial outcomes. Fidelity of interventions to reduce or prevent stress and anxiety during pregnancy and postpartum has yet to be examined despite inconsistent findings for intervention effects. This study systematically reviews use and/or reporting of intervention fidelity strategies in trials of interventions, delivered to (expectant) parents during pregnancy and postpartum, to reduce or prevent stress and/or anxiety.

METHODS

MEDLINE, Embase, CINAHL, PsychINFO, and Maternity and Infant Care were searched from inception to March 2019. Studies were included if they were randomised controlled trials including pregnant women, expectant fathers and/or partners during pregnancy, and/ or parents within the first two years postpartum. The National Institutes of Health Behavior Change Consortium checklist was used to assess fidelity across five domains (study design, provider training, delivery, receipt, enactment).

RESULTS

Sixteen papers (14 interventions) were identified. Average reported use of fidelity strategies was 'low' (45%), ranging from 17.5 to 76%. Fidelity ratings ranged from 22% for provider training to 54% for study design.

CONCLUSIONS

Low levels of intervention fidelity may explain previous inconsistent effects of stress and anxiety reduction interventions. Important methodological areas for improvement include intervention provider training, fidelity of comparator conditions, and consideration of non-specific treatment effects. Increased methodological rigour in fidelity enhancement and assessment will improve intervention implementation and enhance examination of stress and anxiety reduction and prevention interventions delivered during pregnancy and the postpartum.

Perinatal mental health in Ireland: A scoping review

BACKGROUND

The international literature clearly indicates that perinatal mental health issues affect many women, and can have profound negative consequences for both the mother, infant and family, and that the causes of perinatal mental health issues are multifaceted and complex.

AIM

This scoping review explores the existing research on perinatal mental health in Ireland to provide a baseline and to guide further research as well as inform the implementation of the recent policy strategies.

DESIGN

Scoping Review METHODS: We conducted a structured literature search on Science Direct, Web of Science, PubMed, PsychInfo and Scopus, using key words to search for publications up to December 2018. All publications based on empirical studies on perinatal mental health in Ireland (regardless of research design, sample size, and methods used) were included. Exclusion criteria were: study location not the Republic of Ireland; not relating to the perinatal period (pregnancy up to the first 12 months after birth); not relating to mental health; and not relating to maternal mental health, not relating to human subjects; not an empirical study; international study with generalised results. Data were mapped onto a charting form, allowing us to a) conduct a basic numerical analysis of prevalent research questions and designs, and b) to identify key themes within the data, utilising Braun and Clarke's (2006) thematic analysis.

RESULTS

The search resulted in 623 unique references. 29 publications were included in this review. Our analysis resulted in three main findings. (1) A significant number of women in Ireland are affected by perinatal mental health problems, but prevalence rates vary significantly between studies. (2) A history of mental health problems and lack of social support were identified as key risk factors. (3) The existing perinatal mental health services in Ireland are generally inadequate. We further noted a focus on quantitative approaches and a medicalisation of perinatal mental health, resulting in an absence of women's voices and their lived experiences, particularly those of women of colour, migrant women and ethnic minorities.

CONCLUSIONS AND IMPLICATIONS FOR PRACTICE

We conclude that in order to further the vision of woman-centred maternity care, we need to conduct woman-centred research that puts women's subjective experiences of perinatal mental health and well-being at the centre, including those of marginalised women in an increasingly diverse Irish society.

"They Just Need to Come Down a Little Bit to your Level": A Qualitative Study of Parents' Views and Experiences of Early Life Interventions to Promote Healthy Growth and Associated Behaviours

The first 1000 days is a critical window of opportunity to promote healthy growth and associated behaviours. Health professionals can play an important role, in part due to the large number of routine contacts they have with parents. There is an absence of research on the views of parents towards obesity prevention and the range of associated behaviours during this time period. This study aimed to elicit parents’ views on early life interventions to promote healthy growth/prevent childhood obesity, particularly those delivered by health professionals. Semi-structured interviews were conducted with 29 parents (24 mothers, 5 fathers) who were resident in Ireland and had at least one child aged under 30 months. Data were analysed using reflexive thematic analysis. Two central themes were generated: (1) navigating the uncertainty, stress, worries, and challenges of parenting whilst under scrutiny and (2) accessing support in the broader system. Parents would welcome support during this critical time period; particularly around feeding. Such support, however, needs to be practical, realistic, evidence-based, timely, accessible, multi-level, non-judgemental, and from trusted sources, including both health professionals and peers. Interventions to promote healthy growth and related behaviours need to be developed and implemented in a way that supports parents and their views and circumstances.

Paternal mental health during the perinatal period: A qualitative systematic review

AIMS

To examine fathers' experiences and needs associated with mental health during the perinatal period.

DESIGN

Qualitative studies were meta-synthesized using the steps outlined by Sandelowski and Barroso.

DATA SOURCES

Six databases (PubMed, Embase, PsycINFO, CINAHL, Scopus and ProQuest) were searched for qualitative studies from each database's inception to 24 June 2019.

REVIEW METHODS

Studies were critically appraised using the Critical Appraisal Skills Program tool. Qualitative data were extracted, meta-summarized, then meta-synthesized.

RESULTS

Fourteen studies were included and four themes were identified: (a) negative feelings and psychological difficulties, (b) role strain and role conflict with multiple sources, (c) coping strategies that buffered negative feelings and psychological difficulties and (d) support needs to enhance mental health.

CONCLUSION

Fathers reported poor mental health and expressed needs to enhance their mental health across the perinatal period. Future studies can focus specifically on paternal mental health. The development of theory-guided, family inclusive, technology-based healthcare services are needed to manage mental health. Healthcare providers can promote positive mental health to prepare fathers, increasing their awareness to manage their mental health and to seek timely help.

IMPACT

Problem-focused coping (i.e. support and problem-solving with partners and childcare involvement) helped fathers to buffer their negative feelings and psychological difficulties. Future studies should focus on paternal mental health rather than on general fathering experiences. Healthcare providers should focus on promoting positive mental health and well-being. Policymakers should create awareness on paternal mental health across the perinatal period.

Manifestation and Associated Factors of Pregnancy-Related Worries in Expectant Fathers

Background: During the last decades, fathers have increasingly participated in prenatal care, birth preparation classes, and childbirth. However, comparably little is known about the prenatal emotional well-being of fathers, particularly content and extent of broader paternal concerns that may arise during pregnancy beyond those focusing on childbirth. Thus, the aims of this study were to investigate the manifestation of paternal pregnancy-related worries in a population-based sample and to identify relevant associated factors. Materials and Methods: As part of a longitudinal pregnancy cohort at the University Medical Center Hamburg-Eppendorf, Germany, N = 129 expectant fathers were assessed once during pregnancy. Pregnancy-related worries centering around medical procedures, childbirth, health of the baby, as well as socioeconomic aspects were assessed with the Cambridge Worry Scale (CWS). Additionally, paternal socioeconomic background and maternal obstetrical history, symptoms of generalized anxiety and depression, and level of hostility were investigated, as well as perceived social support. The cross-sectional data were analyzed based on multiple regression analyses. Results: The level of reported worries was overall low. Some fathers reported major worries for individual aspects like the health of a significant other (10.9%) and the baby (10.1%), as well as the current financial (6.2%) and employment situation (8.5%). Pregnancy-related worries were negatively associated with household income and positively associated with anxious and depressive symptoms and low perceived social support. Associations varied for specific pregnancy-related worries. Limitations: Due to the cross-sectional data examined in this study, a causal interpretation of the results is not possible. The sample was rather homogeneous regarding its socioeconomic background. More research needs to be done in larger, more heterogeneous samples. Conclusion: Though overall worries were rather low in this sample, specific major worries could be identified. Hence, addressing those fathers reporting major worries regarding specific aspects already in prenatal care might support their psychosocial adjustment. Fathers with little income, those with elevated levels of general anxious and depressive symptoms, and those with less social support reported higher pregnancy-related worries. Our results indicate the relevance of concerns beyond health- and birth-related aspects that could be relevant for fathers. Measurements developed specifically for expectant fathers are needed to properly capture their perspective already during pregnancy.

Psychological well-being of identity-release egg donation parents with infants

STUDY QUESTION

What are the psychological health, relationship quality and perceived social support outcomes of heterosexual couples who have conceived an infant through identity-release egg donation?

SUMMARY ANSWER

Parents' scores on all measures were within the normal range. Egg donation mothers had poorer perceived social support, and egg donation fathers had less optimal psychological health than a comparison group of IVF parents, although these differences were associated with the older age of egg donation parents, rather than being an effect of family type.

WHAT IS KNOWN ALREADY

There is limited understanding of the psychological health and couple relationship quality of egg donation parents, and no empirical data on parents' social support, during the first year of parenthood. No studies have included families who have used an identity-release egg donor. The study offers the first examination of the psychological well-being of identity-release egg donation parents.

STUDY DESIGN, SIZE, DURATION

This study included 57 families created through identity-release egg donation, and a comparison group of 56 families who had used IVF with their own gametes, recruited through UK fertility clinics. Families were visited at home between October 2013 and June 2015. The sample forms part of a larger study examining family functioning in families created following fertility treatment.

PARTICIPANTS/MATERIALS, SETTING, METHOD

All families were heterosexual two-parent families with an infant aged 6-18 months. Mothers and fathers were administered standardised questionnaires assessing psychological health (Edinburgh Postnatal Depression Scale, Trait Anxiety Inventory and Parenting Stress Index-short form), couple relationship quality (Golombok Rust Inventory of Marital State) and perceived social support (Multidimensional Scale of Perceived Social Support).

MAIN RESULTS AND THE ROLE OF CHANCE

Scores from the egg donation and IVF parents were within the normal range on all measures. Significant differences were found between the groups indicating less optimal social support in egg donation mothers compared to IVF mothers, and poorer psychological health in egg donation fathers compared to IVF fathers. These differences appeared to be related to the older age of egg donation parents or to twin parenthood, rather than to egg donation per se. No differences were found between the groups in the parents' relationship quality.

LIMITATIONS, REASONS FOR CAUTION

It is possible that families who were managing the transition to parenthood less well may have been less likely to participate in research. Fewer IVF than egg donation fathers participated in the study, so the statistical power was lower for comparisons between fathers.

WIDER IMPLICATIONS OF THE FINDINGS

The findings are of relevance to UK clinics offering identity-release egg donation. That scores of egg donation parents on measures of psychological well-being were more similar than different to those of IVF parents should prove reassuring to individuals considering this treatment type. As less optimal outcomes were found for egg donation parents on several measures, and these were associated with parental age rather than conception type, it is recommended that clinics discuss with older patients how they may establish a social support network and signpost patients to appropriate post-natal support.

STUDY FUNDING, COMPETING INTERESTS

This research was supported by a Wellcome Trust Senior Investigator Award [097857/Z/11/Z] and a CHESS-ESRC studentship. The authors have no conflicts of interest to declare.

TRIAL REGISTRATION NUMBER

N/A.