Is paternal infant care associated with breastfeeding? A population-based study in Japan

Assessing male involvement in childcare and associated factors among fathers of below two in Toke Kutaye district, Central Ethiopia, 2024: a community-based cross-sectional study

Background

Male involvement in child care is increasingly acknowledged as a crucial factor for promoting positive health and developmental outcomes for children, particularly during the critical early years of life. In Ethiopia, low male participation in child-rearing exacerbates public health issues, including high neonatal and under-five mortality rates. This study examines the prevalence and factors associated with paternal involvement in child care among fathers of children under 2 years in Toke Kutaye District, Central Ethiopia.

Methods

A community-based cross-sectional study was conducted from January 28 to February 16, 2024. A total of 605 fathers with children under 2 years were randomly selected for interviews. Data on male involvement in child care were collected using a structured questionnaire. Data were entered using Epi-data version 3.1 and analyzed using SPSS version 26. Bi-variable and multivariable logistic regression analyses were performed, applying adjusted odds ratios (AOR) with 95% confidence intervals (CI) to assess statistical significance, with a p < 0.05. Descriptive statistics were also computed and presented using text, charts, and tables.

Results

The study found that 36.7% of fathers exhibited good involvement in childcare practices. While a majority contributed financially (55.6%) and engaged in play (55.4%), significantly fewer fathers participated in essential caregiving activities like feeding (27.3%) or seeking healthcare during illness (17.1%). Multivariable analysis identified significant predictors of paternal involvement: completing secondary education (AOR = 5.24, 95% CI: 2.64-10.38), having male children (AOR = 1.69, 95% CI: 1.094-2.62), first birth order (AOR = 5.66, 95% CI: 2.79-11.45), and fewer family size (AOR = 4.82, 95% CI: 2.58-9.016).

Conclusion

This study underscores the limited yet essential role of fathers in child care within the Toke Kutaye District, revealing a need for targeted interventions to enhance paternal engagement. Promoting educational initiatives could serve as a strategy to foster deeper paternal participation in child-rearing practices, ultimately contributing to improved health and developmental outcomes for children.

Fathers' level of involvement in childcare activities and its association with the diet quality of children in Northern Ghana

OBJECTIVE

This study assessed the level of fathers' involvement in childcare activities and its association with the diet quality of their children in Northern Ghana.

SETTING

The study was carried out in the Northern, Upper East and Upper West regions of Ghana. The people in the study area mostly depend on agriculture as their main occupation.

DESIGN

A community-based comparative analytical cross-sectional study.

PARTICIPANTS

A sample of 422 rural mother-father pairs who had at least one child aged 6-36 months.

RESULTS

The overall level of fathers' involvement in childcare and feeding activities was high among 63·5 % of the respondents in the 6 months prior to the study. The most common childcare activity men were involved in was providing money for the purchase of food for the child. Minimum acceptable diet was higher for children with a higher level of paternal involvement in childcare activities (adjusted OR = 3·33 (95 % CI: 1·41, 7·90)), compared to their counterparts whose father's involvement was poor. Fathers who had a positive attitude to childcare and feeding were 2·9 more likely to get involved in childcare activities (adjusted OR = 2·90 (95 % CI: 1·87, 4·48)).

CONCLUSIONS

The findings confirm earlier studies that show that fathers' involvement in childcare activities including feeding is positively associated with improved child feeding practices. The findings point to the need to have a policy shift in which both men and women are key actors in interventions designed to improve child nutritional status in rural settings of Northern Ghana.

Trajectories of fathers' childcare involvement and child behavioral outcomes

BACKGROUND

Father's closeness and playful behavior influence a child's emotional and cognitive development. In this study, we aimed to assess the long-term association of paternal involvement in childcare at 1-3 years of life on subsequent behavioral outcomes at 8 years of age.

METHODS

Data were obtained from the 2010 cohort of the Longitudinal Survey of Newborns in the 21st century in Japan. We used group-based trajectory modeling to predict the trajectory of total childcare scores in surveys 1, 2 and 3 to determine the overall involvement of fathers in childcare during early childhood. The level of fathers' involvement in childcare was categorized as "low", "medium" and "high". Responses from the eighth survey were used to assess child behavioral outcomes using five indicators when the child was 8 years old. Crude and adjusted logistic regression analysis was conducted to estimate the odds ratio (OR) separately for each of the behavioral outcomes of the child.

RESULTS

Among the 17,027 father-child dyads included in this study, two-thirds of the fathers were of the age group 30-39 years. Compared to low involvement, children of fathers with high involvement in childcare during the early childhood years were less likely to not want to go to school even after adjusting for covariates (adjusted OR, 0.46; 95% CI: 0.32-0.66).

CONCLUSIONS

Children benefit from their fathers' involvement in early childcare activities. To improve a child's well-being, fathers should be encouraged by providing them with a suitable working environment with flexible arrangements and the opportunity to involve in childcare.

Knowledge, Attitude and Involvement of First-Time Fathers in Infant and Young Child Feeding and Care Practices

Father’s role is as important as a mother’s in the early years of life to ensure optimum growth and development of the baby. But in most societies, it is often linked with just earning money for the child and the entire family. The present study was undertaken to assess the knowledge, attitude and involvement of first-time fathers in infant and young child feeding and care practices, and their relationship with each other. The influence of select personal and family factors of the fathers was also studied on these aspects. A total of 60 first-time fathers having only one child in the age group of 6 months to 3 years residing in the National Capital Region of India constituted the study sample. A questionnaire schedule was administered to gather information on general and family characteristics, child’s profile, and knowledge, attitudes and involvement of the fathers in infant and young child feeding and care practices. Findings revealed that the total knowledge scores of maximum fathers (43%) were ‘average’. Nearly 60% and 38% fathers respectively had ‘very good’ and ‘good’ total attitude scores. High percentage of fathers had ‘good’ (43%) and ‘very good’ (30%) total involvement scores related to their infant/young child feeding and care practices. A weak but significant positive correlation was found only between knowledge and involvement scores of the fathers (r=0.277, p<0.05). Attitude scores of the fathers were found to be influenced by their occupation while their involvement scores were influenced by their age, and monthly family income. The study indicated that even though the knowledge of the first-time fathers regarding infant and young child feeding practices was average, their attitude regarding these aspects was good, and they also showed a good involvement in these practices. The existing knowledge gaps need to be catered to through suitable timely interventions in order to ensure that fathers can also proactively contribute towards the feeding and care of their infants and young children.

Relationship Between Feeders and Exclusive Breastfeeding and Mixed Feeding During the First Month of Life

BACKGROUND

The critical time to continue or stop breastfeeding is during the first month after hospital discharge. Mothers receive lactation and physical support by fathers and others bottle-feeding human or formula milk to their infants.

PURPOSE

To describe the effect of feeders (mothers, fathers, and others) and different milk feeding on infants' weekly exclusive breastfeeding rates, from birth to 1 month after discharge.

METHODS

This study was a secondary analysis of a descriptive longitudinal study of mothers' (full-term: n = 77; late preterm: n = 39) breastfeeding experience, frequency of feeding, and infant feeding behaviors. Mothers completed a weekly questionnaire of who (mothers, fathers, and others) fed their infants human or formula milk by direct breastfeeding or bottle-feeding.

RESULTS

More than 60% of mothers reported fathers and others bottle-fed their infants. Exclusive breastfeeding rates were significantly higher when only mothers fed their infants at week 1 (P < .001), week 3 (P < .05), and week 4 (P < .05). Exclusive breastfeeding rates were negatively affected across time by bottle-feeding any human or formula milk for all feeders. When fathers bottle-fed their infants at week 1, the relative rates of exclusive breastfeeding at week 4 decreased to 52% (OR = 0.103; 95% CI, 0.26-0.404; P < .0001).

IMPLICATION FOR PRACTICE

Individuals providing early bottle-feeding adversely affect breastfeeding outcomes. Providers need to address maternal and paternal knowledge gaps about early breastfeeding practice.

IMPLICATIONS FOR RESEARCH

Further research is needed to explore clinical standard of care for management of infant weight loss, early supplementation, and support of exclusive breastfeeding outcomes.

Module intervention to improve involvement and practices of fathers towards infant and young child feeding (IYCF) in Coastal South India - a randomized controlled trial

Background: Overall child health depends on nutrition and its related practices. At the family level, responsibility of child feeding lies with both parents. There is no uniform and systematic way to determine and assess the practices of fathers in infant and young child feeding (IYCF). Also, there is a paucity of evidence related to interventions for fathers in improving their practices and involvement in the feeding of their infant or young child (aged less than two years).

Methods: This was a community-based randomized control trial, conducted among 120 fathers with infants and/or young children in Dakshina Kannada District of Karnataka. Fathers with poor level of involvement and practices towards IYCF, during the initial assessment, were included as the study participants. For the intervention, a module in the flipchart format was developed. Simple randomization technique was used to allot the participants into two groups - intervention and control. Participants in the intervention group received module intervention, in addition to the care which they received routinely, and the control group received only routine care. The participants in the intervention group were paid a monthly visit to implement the module, for six months. The post-intervention assessment was done at the end of 6 months.

Results: A total of 117 participants provided post-intervention data. The mean age was 34.7 (+/- 5.48) years in the intervention group and 34.36 years (+/- 5.26) in the control group. The intervention group showed significantly higher improvement in knowledge, attitude, and practice components at 6 months (p<0.05), in both unadjusted and adjusted models.

Conclusions: The extent of increase in practice and involvement in child feeding was clearly higher among the intervention group. The module developed was successful in improving the practices of fathers in feeding their infants and young children.

Clinical Trials Registry India: CTRI/2017/06/008936 (29/06/2017)

Prenatal education program decreases postpartum depression and increases maternal confidence: A longitudinal quasi-experimental study in urban Japan

BACKGROUND

Mothers in urban Japan are at high risk for postpartum depression. Previous research indicates that parents who understand their baby's behavior may have lower risks for postpartum depression. HUG Your Baby helps parents understand their baby's behavior.

AIM

The purpose of this longitudinal study was to determine whether mothers receiving prenatal HUG Your Baby teaching would have better outcomes than a control group with respect to postpartum depression and related factors.

METHODS

Pregnant women, after thirty weeks' gestation, were recruited to either the intervention or the control group. The intervention group received HUG Your Baby education, which teaches how to recognize and respond to a baby's behavior. The control group received a leaflet and regular, prenatal treatment. Participants completed the Edinburgh Postnatal Depression Scale, Karitane Parenting Confidence Scale, and three other scales at one and three months, postpartum. Questions about knowledge of baby's behavior was administered prenatally, and at one and three months, postpartum.

FINDINGS

Data derived from 221 mothers (Control 100, Intervention 121) were included in the analysis. Researchers found significant differences regarding postpartum depression at one and three months and parenting confidence at one month. Scores were favorable for the intervention group.

CONCLUSIONS

The HUG Your Baby program has a positive impact on preventing postpartum depression and increasing parenting confidence. It warrants wider implementation and evaluation in prenatal programs.

Development of the breastfeeding support scale to measure breastfeeding support from lay and professional persons, and its predictive validity in Japan

Background

International and national organizations recommend exclusive breastfeeding for the first 6 months of life, but many women stop earlier. Lay and professional persons can support mothers’ efforts to overcome breastfeeding difficulties. Considering breastfeeding support to comprise emotional support, practical help, and information offered to women who desire to breastfeed (by professionals, family members, and others), we developed and tested a scale to measure it in Japan.

Methods

A total of 31 items were generated by literature review and from the authors’ clinical experiences. Those items were tested with 243 mothers who visited public health centers in Tokyo for their infant’s health check-up 3 months after birth. Breastfeeding support and infant feeding status were then assessed 5 months after birth. All the data were collected by using self-administered questionnaires.

Results

On the basis of the results of factor analysis, the number of items was reduced to 11. There were three factors: support from breastfeeding peers and from people in specifically named healthcare professions, practical help, and support from people the mother can rely on to help meet emotional needs and address breastfeeding concerns. Internal-consistency reliability (alpha) of scores on the 11-item scale was 0.83 when measured 3 months postpartum and 0.85 when measured 5 months postpartum. Higher scores on the 11-item scale 3 months postpartum were associated with more breastfeeding exclusivity both at that time (Kruskal–Wallis test, chi-squared = 14.871, df = 3, n = 211, p = 0.002, eta-squared = 0.071) and also 5 months postpartum (Kruskal–Wallis test, chi-squared = 8.556, df = 3, n = 159, p = 0.036, eta-squared = 0.054). Further, the area under the Receiver Operating Characteristic curve was 0.73 (95% CI [0.57–0.88]), which indicates that scores on the 11-item scale 3 months postpartum may be useful to predict which mothers will be less exclusive in breastfeeding 5 months postpartum. In conclusion, scores on this 11-item scale were reasonably reliable and valid for measuring breastfeeding support provided by lay and professional persons to mothers in Japan. Further research is required to evaluate this scale’s applicability in other settings.

Relationships between paternal attitudes, paternal involvement, and infant-feeding outcomes: Mixed-methods findings from a global on-line survey of English-speaking fathers

The breastfeeding intention-behaviour gap remains wide in developed countries. Current studies have focused on maternal attitudes and behaviours concerning infant feeding in order to explore barriers to breastfeeding continuation. There has been limited consideration of the impact of paternal attitudes and behaviours, despite contemporary parenthood evolving and evidence indicating that there are greater levels of paternal involvement in routine childcare tasks. This mixed-methods study used a triangulation design to examine the associations between paternal attitudes towards parenthood and infant-feeding methods, levels of paternal involvement, infant-feeding outcomes, and father-infant relationships. Fathers of infants <52 weeks completed an online survey providing quantitative data (N = 212) and qualitative data (N = 208). For the quantitative data, fathers completed validated measures about their attitude towards parenthood and infant feeding, levels of paternal involvement, and infant-feeding history. For the qualitative data, questions explored influences on paternal attitudes towards infant feeding and the father-infant relationship. After controlling for covariates, regression analyses found egalitarian attitudes towards parenthood were positively associated with both attitudes towards breastfeeding and levels of paternal involvement. Positive paternal attitudes towards breastfeeding were significantly associated with increased likelihood of breastfeeding. A thematic framework analysis indicated fathers' attitudes towards infant feeding were largely influenced by their families and partners or healthcare professionals. Polarised views were expressed about the impact infant-feeding methods had on the father-infant relationship, although fathers were united in their desire to bond with their infant. Addressing paternal attitudes and the importance of father-infant involvement in domains other than feeding maybe beneficial in supporting breastfeeding and the father-infant relationship.

The differential role of practical and emotional support in infant feeding experience in the UK

Social support is a known determinant of breastfeeding behaviour and is generally considered beneficial. However, social support encompasses a myriad of different supportive acts, providing scope for diverse infant feeding outcomes. Given the vulnerability of postpartum mental health, this paper aims to explore both how support prolongs breastfeeding and which forms of support promote the positive experience of all infant feeding. Using survey data collected online from 515 UK mothers with infants aged 0-108 weeks, Cox regression models assessed the relationship between receiving different types of support, support need and breastfeeding duration. Quasi-binomial logistic regression models assessed the relationship between receiving support, infant feeding mode and maternal experience of infant feeding. Rates of negative infant feeding experience indicate the widespread need for support: e.g. 38% of currently, 47% of no longer and 31% of never breastfeeding women found infant feeding stressful. Overall, practical support via infant feeding broadly predicted shorter breastfeeding durations and poorer feeding experience; results in relation to other forms of support were more complex. Our findings indicate different forms of support have different associations with infant feeding experience. They also highlight the wide range of individuals beyond the nuclear family on which postpartum mothers in the UK rely. This article is part of the theme issue 'Multidisciplinary perspectives on social support and maternal-child health'.

Maternal perception of paternal breastfeeding support: A secondary qualitative analysis

OBJECTIVE

To describe how women perceive paternal support of breastfeeding and identify actions women value during the early breastfeeding postpartum.

DESIGN

A qualitative secondary analysis of semi-structured interviews using thematic analysis collected after birth and via telephone at 1, 2, 3, and 4 weeks after discharge.

SETTING

A regional medical center in the southeast region of the United States.

PARTICIPANTS

Sixty-two women yielded 130 transcripts with 32 transcripts conducted after birth, and 19, 16, 27, and 36 transcripts conducted after discharge via telephone at weeks 1, 2, 3, and 4, respectively.

FINDING

Women reported three themes of paternal support of breastfeeding (1) participating in the breastfeeding decision, (2) being a partner of breastfeeding, and (3) caring for breastfeeding mothers.

CONCLUSION AND IMPLICATION FOR PRACTICE

Paternal support of breastfeeding is a learning process that requires teamwork for women and their partners to master breastfeeding. Women and their partners as co-parents solve breastfeeding problems and achieve their breastfeeding goals, which promotes maternal well-being and bonding with their infants. Future interventions will guide partners to support breastfeeding and women's postpartum physical and psychological needs.

Paternal Involvement in and Sociodemographic Correlates of Infant and Young Child Feeding in a District in Coastal South India: A Cross-Sectional Study

Context: The feeding practices during first 2 years of life determine the overall health and survival during childhood and beyond. Child nutrition is responsibility of both parents and so far emphasis has been laid mostly on mothers. Fathers' involvement toward Infant and Young child feeding (IYCF) has been proved to be of paramount importance and yet it is given limited importance.

Objectives: This study aims to study the level of paternal involvement toward IYCF and its associated factors and to assess the knowledge, attitude, and practices toward IYCF in Dakshina Kannada District in South Indian State of Karnataka.

Settings and Design: This community-based cross-sectional study was conducted in the coastal District of Dakshina Kannada; Karnataka State in India.

Methods: The study included 450 fathers of infant and young children (aged <2 years) in five taluks of Dakshina Kannada district. They were assessed for knowledge, attitude, and practices related to IYCF. Median score for the practice component was considered cut off to classify involvement in IYCF. Data were analyzed using IBM SPSS Statistics for Windows, Version 25.0. Armonk, NY: IBM Corp. Chi-square-test and Binary Logistic Regression with Hosmer-Lemeshow goodness-of-fit model were used. Unadjusted and adjusted odds ratios were generated. A p-value of <0.05 was considered statistically significant.

Results: Mean age of the study population was 34.6 years (SD, 5.4). The practice scores median (IQR) was 34.0 (IQR, 31.0–39.0), and 40.9% of the participants had poor involvement in IYCF. This was significantly higher among fathers from predominantly urban area. Those who had education above graduation and younger fathers had better involvement in IYCF.

Conclusions: Less than half of fathers had poor involvement in IYCF, and it was lower among fathers from urban areas, higher age, and lower educational levels.

Race and Ethnicity and Exclusive Breastfeeding Success

Introduction: Breast milk is the ideal food for infants. However, at 6 months of age, <25% of infants in the United States are exclusively breastfed. While racial disparities in breastfeeding have been documented, questions remain about the contributions of paternal race and ethnicity to breastfeeding. Materials and Methods: This single-site, prospective study investigated the association of parental characteristics and exclusive breastfeeding (EBF). EBF and non-EBF (N-EBF) infants who were >35 weeks gestational age were compared at nursery discharge and ∼30 days of age. Results: At nursery discharge (n = 499), mean birth weight (±standard deviation [SD]) was greater in the EBF versus N-EBF cohort (3.4 ± 0.4 versus 3.3 ± 0.5 kg, p = 0.01). When compared to the N-EBF cohort, infants in the EBF cohort were significantly more likely to have the following characteristics: (1) vaginal birth; (2) non-Hispanic parents; (3) parents with higher socioeconomic status, and (4) parents who are English-speaking (p < 0.01 for all). Similar findings persisted at 30 days. Non-Hispanic parents were 2 (95% confidence interval [CI]: 1.4-3.3) and 3.5 (95% CI: 1.5-7.9) times more likely to exclusively breastfeed than Hispanic parents at nursery discharge and 30 days, respectively. At nursery discharge, families with a Hispanic mother and non-Hispanic father were more likely to EBF than families with a Hispanic mother and father (odds ratio 2.9, 95% CI: 1.1-7.6). In multivariate model, parental ethnicity was associated with EBF at discharge (p = 0.03) and 30 days (p = 0.02). Conclusion: Paternal ethnicity may influence EBF. Addressing disparities in EBF may warrant investigations into culturally inclusive and family-centered interventions.

Modular intervention to improve paternal involvement and support for better infant and young child feeding in a district of coastal South India: a randomized controlled trial protocol

Background: The major determinant to the well-being of infants and young children (IYC) is their feeding practices. These practices are the responsibility of both parents, meaning that fathers have an equal role to mothers. Fathers' involvement can have an impact on the overall health of the children. Despite this, paternal involvement towards IYC feeding (IYCF) have not been studied adequately. Methods: This randomized control trial (n=120) will be conducted among fathers of infants (children aged <1 year) and young children (children aged 12-23 months) in selected households in Dakshina Kannada District of the southern Indian State of Karnataka. The study will be conducted after an initial baseline assessment on awareness, attitude and involvement of fathers in IYCF. Fathers with scores less than the 50 th percentile in the practice component will be categorized as fathers with poor involvement and will be potential participants for the trial. A visual module will be developed and validated for improving paternal involvement in IYCF. Using a simple randomization technique, the participants will be allocated to modular intervention and control group (1:1 allocation). Each participant in the intervention arm will be visited once a month to implement the module, for six months on a one-to-one basis. Following the intervention, a post-test assessment will be done for both groups to measure the level of paternal involvement in IYCF. Ethics and dissemination: Approval has been obtained from the Institutional Ethics Committee of Kasturba Medical College, Mangalore, India. The dissemination plans include scientific conferences and publication in scientific journals. Registration: The study is registered with Clinical Trial Registry of India ( CTRI/2017/06/008936).

Modular intervention to improve paternal involvement and support for better infant and young child feeding in a district of coastal South India: a randomized controlled trial protocol

Background: The major determinant to the well-being of infants and young children (IYC) is their feeding practices. These practices are the responsibility of both parents, meaning that fathers have an equal role to mothers. Fathers' involvement can have an impact on the overall health of the children. Despite this, paternal involvement towards IYC feeding (IYCF) have not been studied adequately. Methods: This randomized control trial (n=120) will be conducted among fathers of infants (children aged <1 year) and young children (children aged 12-23 months) in selected households in Dakshina Kannada District of the southern Indian State of Karnataka. The study will be conducted after an initial baseline assessment on awareness, attitude and involvement of fathers in IYCF. Fathers with scores less than the 50 th percentile in the practice component will be categorized as fathers with poor involvement and will be potential participants for the trial. A visual module will be developed and validated for improving paternal involvement in IYCF. Using a simple randomization technique, the participants will be allocated to modular intervention and control group (1:1 allocation). Each participant in the intervention arm will be visited once a month to implement the module, for six months on a one-to-one basis. Following the intervention, a post-test assessment will be done for both groups to measure the level of paternal involvement in IYCF. Ethics and dissemination: Approval has been obtained from the Institutional Ethics Committee of Kasturba Medical College, Mangalore, India. The dissemination plans include scientific conferences and publication in scientific journals. Registration: The study is registered with Clinical Trial Registry of India ( CTRI/2017/06/008936).

Sex differences in depression during pregnancy and the postpartum period

Women have a lifetime risk of major depression double that of men but only during their reproductive years. This sex difference has been attributed partially to activational effects of female sex steroids and also to the burdens of pregnancy, childbirth, and parenting. Men, in contrast, have a reproductive period difficult to delineate, and research on the mental health of men has rarely considered the effects of fatherhood. However, the couple goes through a number of potentially stressing events during the reproductive period, and both mothers and fathers are at risk of developing peripartum depression. This Review discusses the literature on maternal and paternal depression and the endocrine changes that may predispose a person to depression at this stage of life, with specific focus on the hypothalamus–pituitary axis, oxytocin, and testosterone levels in men. Important findings on sex differences in the neural correlates of maternal and paternal behavior have emerged, highlighting the relevance of the emotional brain in mothers and the sociocognitive brain in fathers and pointing toward the presence of a common parents' brain. Additionally, sex differences in neurogenesis and brain plasticity are described in relation to peripartum depression. © 2016 The Authors. Journal of Neuroscience Research Published by Wiley Periodicals, Inc.

Breastfeeding as a public health responsibility: a review of the evidence

BACKGROUND

Although intention to breastfeed in Western culture is high, many women stop breastfeeding before they are ready. From a physiological perspective, rates of primary milk insufficiency or contraindications to breastfeed should be low. However, numerous women encounter numerous barriers to breastfeeding, many of which occur at the social, cultural and political level and are therefore outside of maternal control. This review identifies and examines the impact of these barriers and considers how public health services should play a central role in creating a supportive breastfeeding environment.

METHODS

A narrative review to synthesise themes in the literature was conducted, using Web of Science, PubMed and Science Direct. Barriers to breastfeeding at the societal rather than individual level were identified (e.g. in relation to health services, policies and economic factors). Only English language papers were included.

RESULTS

Many barriers to breastfeeding exist at the societal rather than individual level. These influences are typically outside mothers' control. Five core themes were identified; the need for investment in (i) health services; (ii) population level health promotion; (iii) supporting maternal legal rights; (iv) protection of maternal wellbeing; and (v) reducing the reach of the breast milk substitute industry.

CONCLUSIONS

Although individual support is important, breastfeeding must be considered a public health issue that requires investment at a societal level. Focusing solely on solving individual issues will not lead to the cultural changes needed to normalise breastfeeding. Countries that have adopted a multicomponent public heath strategy to increase breastfeeding levels have had significant success. These strategies must be emulated more widely.

Relationships between types of father breastfeeding support and breastfeeding outcomes

Fathers' support can influence mothers' breastfeeding decisions and behavior. Potentially supportive behaviors have been reported in previous studies, but no studies have directly examined which, if any, of those actions are actually more likely to result in desired breastfeeding outcomes. The two studies reported in this paper address this gap by examining relationships between fathers' reported breastfeeding support and mothers' perceptions of received support and breastfeeding intentions, satisfaction, and duration. The Partner Breastfeeding Influence Scale (PBIS) was used in an online survey with 64 women and 41 men (34 couples) and a telephone survey with 80 mothers and 65 fathers (63 couples). Fathers' and mothers' reports of how often fathers engage in the types of support measured by the PBIS were used to predict breastfeeding intentions, satisfaction, and duration. In Study 1, responsiveness predicted breastfeeding success and satisfaction for men and satisfaction for women. However, mothers' intended breastfeeding duration was shorter when fathers both wanted them to breastfeed for a long time and were more appreciative and savvy about breastfeeding. In Study 2, when fathers reported being more appreciative and directly involved in breastfeeding, mothers reported shorter breastfeeding duration. In both studies, mothers' perceptions of their partners' responsiveness and fathers' reports of their own responsiveness predicted longer breastfeeding intentions and duration. These findings suggest that the most effective breastfeeding support is delivered using a sensitive, coordinated teamwork approach that is responsive to the mother's needs.

Overview of Longitudinal Survey of Newborns in the 21st Century: Factors Affecting Infant Growth

There are two major nationwide birth cohort studies in Japan, namely, the Longitudinal Survey of Newborns in the 21st Century conducted by the Ministry of Health, Labor and Welfare (MHLW) and the Japan Environment and Children's Study (JECS) conducted by the Ministry of Environment. The former was a longitudinal questionnaire survey focusing on environmental and socioeconomic factors for descriptive epidemiology conducted every year since 2001 by mail. The latter was based on 15 unit centers nationwide with environmental measurements and collection of biological samples for environmental risk evaluation. Both are prospective birth cohort studies whose findings will be expected as the basis for establishing health policies. The data obtained in the former study can be used for research with permission from MHLW. To date, there have been more than ten published studies using those data. We have reviewed these studies and introduced our preliminary findings on factors affecting infant growth. Employment before delivery, educational background of parents, household income, and smoking habit of both parents have been suggested to affect infant growth. We will analyze the associations between socioeconomic factors and infant growth trajectory to elucidate the most adequate intervention for children.

Study protocol for a randomised controlled trial to test the effectiveness of providing information on childbirth and postnatal period to partners of pregnant women

INTRODUCTION

The objective of this study is to investigate the effect of the distribution of a booklet providing information to fathers during their partners' pregnancies on fathers' and mothers' postpartum mental health and quality of life (QOL), as well as on fathers' childcare participation and living situations.

METHODS AND ANALYSIS

This randomised controlled trial will comprise 554 couples consisting of pregnant women due to give birth at an obstetric institution in Aichi Prefecture, Japan and their partners. Participants will be recruited during prenatal check-ups in the third trimester, and those who provide written consent will be allocated randomly to an intervention and a control group. The pregnant women's partners allocated to the intervention group will be given a booklet written for men containing information on childbirth and postnatal period. Its content will include matters such as what preparations the partner should make before birth and tips for housework and childcare as well as how to prevent unintentional injury to the baby. The control group will not receive any intervention. A baseline survey in the third trimester and follow-up surveys at 1 and 3 months post partum will be carried out using self-administered questionnaires. The primary outcome is the proportion of new mothers' partners at risk for paternal depression (Edinburgh Postnatal Depression Scale score ≥8). Secondary outcomes include the risk of postnatal depression in new mothers, QOL of new mothers and their partners, partners' knowledge of and engagement in housework and childcare, marital relations and parenting stress on the part of new mothers.

ETHICS AND DISSEMINATION

This study has been approved by the Ethical Committee at the National Center for Child Health and Development, Tokyo, Japan. The results of the study will be widely disseminated as peer-reviewed papers and at international conferences, with the aim of improving public health services in Japan.

TRIAL REGISTRATION NUMBER

UMIN000021475; Pre-results.

Changes in maternal hemoglobin during pregnancy and birth outcomes

Background

The relationship between maternal hemoglobin (Hb) levels during pregnancy and birth outcomes has been controversial. Changes in Hb level during pregnancy may have an impact on birth outcomes. This study aimed to investigate whether changes in Hb levels from early to mid- or late pregnancy is associated with birth outcomes.

Methods

Participants were singleton mothers who delivered at the National Center for Child Health and Development between 34 and 41 weeks of gestation in 2010 and 2011 (n = 1,986). Hb levels were measured at three time points: early (<16 weeks), mid- (16–27 weeks), and late (28–36 weeks) pregnancy. Associations between changes in Hb levels from early to mid- or late pregnancy and birth outcomes (birth weight, Z-score of birth weight, placental weight, and placental ratio) were assessed by multiple regression, adjusting for maternal and fetal covariates.

Results

A smaller reduction in Hb levels from early to mid- or late pregnancy was significantly associated with lower birth weight, Z-score of birth weight, placental weight, and placental ratio. Compared to women with an intermediate reduction from early to late pregnancy, women with the least reduction had a significantly increased risk of delivering low birth weight (LBW) (adjusted odds ratio [aOR], 2.0; 95% confidence interval [CI], 1.3-3.1) and small-for-gestational-age (SGA) (aOR, 1.6; 95% CI, 1.04-2.3) infants, while women with the greatest reduction had a significantly decreased risk of delivering SGA (aOR, 0.38; 95% CI, 0.23-0.65) infants, but an increased risk of high placental ratio (aOR, 1.7; 95% CI, 1.2-2.5).

Conclusions

Hb changes from early to mid- or late pregnancy were inversely associated with birth weight, placental weight, and placental ratio.

Breastfeeding initiation and duration in first-time mothers: exploring the impact of father involvement in the early post-partum period

BACKGROUND

The early post-partum period is a crucial time for breastfeeding support. Mothers who have physical and emotional support during this period are more likely to be successful in breastfeeding. This study examined the relationship between father involvement and support for breast feeding initiation and duration in first-time mothers.

METHODS

Overall, 146 women who attended a childbirth education class or breastfeeding course at BABS were asked to fill out the Childbirth Experiences Survey, which explored key topics such as (1) breastfeeding initiation, (2) early post-partum breastfeeding, (3) breastfeeding plan, (4) post-partum breastfeeding support and (5) breast feeding duration. This was a voluntary self-reported ques-tionnaire. The surveys were completed by the mothers during the post-partum period.

RESULTS

45.9% (n=67) of mothers received helped from their husband or part-ner with breastfeeding while in the hospital, while 54.1% (n=79) of mothers did not receive support from their partners. Mothers who received early post-par-tum breastfeeding support were more likely to continue breastfeeding after leaving the hospital.

CONCLUSION

First-time mothers who identified as having breastfeeding support from their partners, the infant's father, during the early post-partum period were more likely to initiate breastfeeding and had longer breastfeeding durations.

Fathers' experiences of supporting breastfeeding: challenges for breastfeeding promotion and education

Increasing breastfeeding rates is a strategic priority in the UK and understanding the factors that promote and encourage breastfeeding is critical to achieving this. It is established that women who have strong social support from their partner are more likely to initiate and continue breastfeeding. However, little research has explored the fathers' role in breastfeeding support and more importantly, the information and guidance he may need. In the current study, 117 men whose partner had given birth in the previous 2 years and initiated breastfeeding at birth completed an open-ended questionnaire exploring their experiences of breastfeeding, the information and support they received and their ideas for future breastfeeding education and promotion aimed at fathers and families. Overall, the findings showed that fathers were encouraging of breastfeeding and wanted to be able to support their partner. However, they often felt left out of the breastfeeding relationships and helpless to support their partner at this time. Many reported being excluded from antenatal breastfeeding education or being considered unimportant in post-natal support. Men wanted more information about breastfeeding to be directed towards them alongside ideas about how they could practically support their partner. The importance of support mechanisms for themselves during this time was also raised. The results highlight the need for health professionals to direct support and information towards fathers as well as the mother-infant dyad and to recognise their importance in promoting and enabling breastfeeding.

Changes in cytomegalovirus seroprevalence in pregnant Japanese women-a 10-year single center study

BACKGROUND

Human cytomegalovirus (CMV) causes congenital infections during pregnancy, and seroepidemiological data are important for estimating the risk of infection. However, only a few reports of CMV seroprevalence exist for pregnant Japanese women.

OBJECTIVES

The purpose of this study was to assess CMV seroprevalence in pregnant Japanese women.

STUDY DESIGN

This cross-sectional study involved pregnant Japanese women who delivered from 2003 to 2012 at our hospital (n=15,616). Among these women, 14,099 (90.3%) underwent tests for the presence of CMV IgG. Those with an equivocal test result were excluded (n=195) from this analysis, leaving a study sample of 13,904 Japanese pregnant women. The prevalence of CMV IgG was also assessed by calendar year, age, and parity.

RESULTS

The overall CMV IgG prevalence rate was 66.0%. CMV IgG prevalence significantly decreased over the course of 10 years from 2003 to 2012 (from 69.9% in 2003 to 65.2% in 2012) (p<0.001). Adjusted odds ratios for CMV IgG positivity in women aged <25, 25-30, 35-40, and >40 years were 1.66 (95%CI: 1.25-2.20), 1.20 (95%CI: 1.07-1.35), 1.16 (95%CI: 1.07-1.26), and 1.44 (95%CI: 1.28-1.62), respectively, compared to women aged 30-35 years. Adjusted odds ratios for CMV IgG positivity for a parity of 1, 2, and ≥3 were 1.14 (95%CI: 1.06-1.23), 1.52 (95%CI: 1.32-1.77), and 2.54 (95%CI: 2.69-3.84), respectively, compared to nulliparous women.

CONCLUSION

We found that 34% of pregnant Japanese women were susceptible to CMV infection. Calendar year, maternal age, and parity were significantly associated with changes in CMV seroprevalence among this population.

BMI mediates the association between low educational level and higher blood pressure during pregnancy in Japan

BACKGROUND

Research investigating the association between socioeconomic status (SES) and blood pressure (BP) during pregnancy is limited and its underlying pathway is unknown. The aim of this study was to investigate the mediators of the association between educational level as an indicator of the SES and BP in early and mid-pregnancy among Japanese women.

METHODS

Nine hundred and twenty-three pregnant women in whom BP was measured before 16 weeks and at 20 weeks of gestation were enrolled in this study. Maternal educational levels were categorized into three groups: high (university or higher), mid (junior college), and low (junior high school, high school, or vocational training school).

RESULTS

The low educational group had higher systolic (low vs. high, difference = 2.39 mmHg, 95% confidence interval [CI]: 0.59 to 4.19) and diastolic BP levels (low vs. high, difference = 0.74 mmHg, 95% CI: -0.52 to 1.99) in early pregnancy. However, the same associations were not found after adjustment for pre-pregnancy body mass index (BMI). BP reduction was observed in mid-pregnancy in all three educational groups and there was no association between educational level and pregnancy-induced hypertension.

CONCLUSION

In Japanese women, the low educational group showed higher BP during pregnancy than the mid or high educational groups. Pre-pregnancy BMI mediates the association between educational level and BP.