Journal of Human Lactation - online first articles

Journal of Human Lactation, Ahead of Print.
Background:The benefits of breastfeeding in promoting child survival are well recognized. As one of the nutritional interventions for children, exclusive breastfeeding protects babies from various diseases that contribute to infant morbidity and mortality. However, no systematic review and meta-analysis has examined the influence of breastfeeding promotion programs on exclusive breastfeeding rates in sub-Saharan Africa.Research Aim:We examined the influence of breastfeeding promotion programs on exclusive breastfeeding rates at < 1 month, and at 1–5 months of breastfeeding in sub-Saharan countries including Ghana, Burkina Faso, Uganda, South Africa, Guinea-Bissau, Kenya, Tanzania, and the Democratic Republic of Congo.Methods:A systematic review and meta-analyses study of randomized controlled trials and quasi-experimental studies was conducted by searching in electronic databases and articles’ reference lists. Two investigators independently evaluated and extracted the data. A total of 131 studies were identified using five databases. Of the 10 studies meeting the inclusion criteria for systematic review, seven studies were included in the meta-analysis. We used a random-effects model to pool studies together and performed a subgroup analysis.Results:Breastfeeding promotion programs resulted in significantly higher exclusive breastfeeding rates at < 1 month (OR = 1.60, 95% CI [1.36,1.86]). However, there was no significant effect observed for exclusive breastfeeding at 1–5 months. Combined interventions were more effective in improving exclusive breastfeeding rates than individual counseling or home-based counseling alone.Conclusion:Breastfeeding promotion programs in sub-Saharan Africa are effective in increasing exclusive breastfeeding rates at 6 months after birth.

Journal of Human Lactation, Ahead of Print.
Background:Glutamic acid, an amino acid that exhibits umami taste, is utilized in Japanese food and is abundant in human milk. We examined the influence of maternal habitual eating behavior on glutamic acid concentration in human milk.Research Aim:To determine the association between maternal dietary behaviors at the end of pregnancy and the 1st month postpartum and glutamic acid concentration in colostrum and mature milk.Method:This was a prospective, correlational, one-group longitudinal study. Women aged 20–30 years during the third trimester of pregnancy (N = 30) consented to participate and completed the data collection. Dietary history questionnaires were used to measure food intake. Glutamic acid levels in whey from colostrum and mature milk and in plasma during late pregnancy and the first month postpartum were measured. Data were considered significant at p < .05. Basic statistics, correlation coefficients analysis, unpaired t test, and one-way analysis of variance were performed.Results:Glutamic acid concentrations in human milk and plasma were found to be significantly associated with the consumption of several different foods. There was no association between glutamic acid concentrations in human milk and plasma or between glutamic acid concentrations in colostrum and mature milk. The glutamic acid content of mature milk differed by physical activity level (mild and moderate) during the first month postpartum (t [46] = 2.87, p < .01).Conclusion:There was no clear association between habitual dietary behavior and glutamic acid concentration in human milk. However, maternal factors other than diet may be important and require additional research.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.
Background:Ten years ago, the U.S. Surgeon General’s Call to Action to Support Breastfeeding made recommendations for childcare settings, including: (1) accommodating and supporting breastfeeding families; and (2) adopting national guidelines on breastfeeding support in childcare settings.Research Aims:To (1) describe the existing breastfeeding friendly childcare designation programs in the United States; and (2) describe how states are accommodating breastfeeding families in childcare settings.Method:The study design was cross-sectional, prospective thematic description of existing publicly available documents. A search of state breastfeeding coalitions was conducted to assess the number of states with breastfeeding friendly childcare designation programs. A definitive yes-or-no answer regarding whether each state had a program was obtained from all 50 states. For states with programs, designation materials were analyzed using thematic analysis and the framework method to compare designation components.Results:Fifteen states had evidence of breastfeeding friendly childcare designation programs and similarities exist across designation program components. Four standards were common to all 15 programs: written policy on breastfeeding, suitable space within the center where mothers can breastfeed or express their milk, educational materials, and resources on breastfeeding available to parents. Most states required self-assessment to achieve designation status.Conclusion:Research is needed to enable evidence-based programs and decision-making regarding components and processes. Federal funding should support these programs’ mission, including funding research to assess how and in what circumstances these programs are improving breastfeeding-related outcomes and supporting breastfeeding families.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.
Background:Globally, 10% of all births are preterm. Access to human milk via manual breast expression is required to reduce the incidence of adverse outcomes related to prematurity. However, there is little evidence to recommend optimum timing to commence breast expression in mothers of preterm infants or the most effective method.Research Aims:(1) To test feasibility of recruitment and compliance to the protocol and (2) to determine influence of using hand expressing and breast massage on milk production, engorgement, mastitis, and breastfeeding status at 3 months.Methods:This study was an exploratory parallel two-group, pilot randomized controlled trial. Mothers of preterm infants at a metropolitan maternity hospital in Queensland Australia (N = 31) were randomized to receive either hand expressing and breast massage within the 1st hr of birth or standard care, hand expressing within 6 hr of birth, to determine the influence on milk production, engorgement, mastitis, and breastfeeding status at 3 months.Results:Feasibility targets were not met; however, valuable learning from this trial uncovered barriers facing midwives in the birth suite to commencing expressing in the 1st hr of birth. There was no difference in occurrence of secondary outcomes, although trends support future study.Conclusions:Overall, unpredictability of preterm birth influenced our ability to recruit participants. Important directions for future study design would benefit from incorporating expressing times up to 6 hr with a replicable breast massage.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.
Background:With strict public health measures implemented in March 2020 due to the COVID-19 pandemic, many breastfeeding parents, who are within an at-risk population, have experienced limited formal and/or informal breastfeeding social support. In the Canadian context, the experiences of these women is unknown.Research Aim:To explore the experiences of at-risk postpartum breastfeeding women in accessing formal and informal breastfeeding social support during the COVID-19 pandemic.Methods:This was a prospective, longitudinal interpretive description study using mixed methods. Data were gathered using an online survey and one 52–112-min semi-structured interview at 12-weeks postpartum. At-risk breastfeeding participants were those who lack social support and had at least one of the following: age < 25 years; experiencing or had experienced intimate partner violence; or of low income. We sought participants’ experiences of accessing breastfeeding social support during the first few months of the COVID-19 pandemic/lockdown. Seven participants completed the survey and the interview.Results:Participants identified that the COVID-19 pandemic created barriers to accessing formal and informal breastfeeding social support, which stemmed from public health restrictions and difficulties communicating online with families and healthcare providers. Additionally, participants identified that the COVID-19 pandemic/lockdowns facilitated feelings of connectedness, protection, and resiliency.Conclusion:We provide preliminary insight into the experiences of trying to access breastfeeding social support during the COVID-19 pandemic. Future researchers should seek to prioritize improved communication and resources in supporting breastfeeding during COVID-19 and future pandemics/lockdowns.

Journal of Human Lactation, Ahead of Print.
Background:Secretory activation is characterized biochemically in human milk by a fall in sodium concentration, an increase in potassium concentration, and a decreased sodium to potassium ratio. These markers can be used to identify a delay in secretory activation which can result from hormonal birth control.Research Aim:To evaluate if the insertion of the Etonogestrel implant early in the postpartum period would delay the time to secretory activation as measured by biochemical markers.Methods:We conducted a prospective, longitudinal, non-randomized, observational cohort study. Women with singleton pregnancies were identified as wanting either no birth control or the Etonogestrel implant in the postpartum period. Human milk samples were collected starting at 12 hours after delivery, and then in 12-hour increments. Samples were tested for sodium and potassium levels.Results:As in the unadjusted models, there was evidence of a difference in sodium levels at two days postpartum, with the sodium level higher by 32.29 mM (95% CI [7.39, 57.20], p = .013) in the implant group than in the no birth control method group. A difference at day 2 was observed in the ratio (sodium/potassium) levels, with a higher mean ratio in the implant group by 2.49 (95% CI [0.14, 4.85], p = .039). For potassium levels, the only difference was observed at day 4, with lower values in the implant group (p = .045).Conclusion:The transition from colostrum to copious milk secretion is delayed by the early insertion of the Etonogestrel device. This is evidenced by the delay in biochemical markers normally seen in secretory activation.

Journal of Human Lactation, Ahead of Print.
Background:Human colostrum has been used in a number of investigations when preterm human infants cannot, for any reason, breastfeed directly from their mothers. One of the growing fields in these investigations is colostrum therapy, which consists of exposing the oropharyngeal mucosa of these preterm newborns to small amounts of raw colostrum.Research Aim:To critically review the scientific evidence about colostrum therapy in premature infants and to explore its influences on the immune system.Methods:This systematic review was performed according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA statement). The following databases were searched for potentially eligible studies up to March 10, 2021: Medline, Scopus, Web of Science, Cochrane Library, Embase. Two reviewers independently screened all titles, abstracts, and full texts for eligibility.Results:A total of 12 studies with 996 participants were included. A significant difference in lactoferrin levels in the urine was found (SMD 0.70; 95% CI [0.03,1.36]; p = .04; I² = 65% two studies, 112 participants, very low-quality evidence).Conclusion:Colostrum seems to result in increasing lactoferrin levels in the urine of premature newborns after 1 week of intervention.Clinical Trial Registration:The study was registered at PROSPERO with the number CRD42017073624, submitted on August 9, 2017.

Journal of Human Lactation, Ahead of Print.
Background:There is an increasing prevalence of expressed human milk feeding. The reasons for expressed human milk feeding of healthy term infants may differ from those for preterm infants. The process of adopting expressed human milk feeding for healthy full-term infants has not been well-described in the existing literature.Research Aim:To describe the reasons for, and antecedents to, expressed human milk feeding among Chinese women who used a high proportion of expressed human milk for feeding.Methods:A descriptive, prospective cross-sectional qualitative design was used. Participants (N = 25) who used a high proportion of expressed human milk feeding were recruited from a larger perspective cohort study in two public hospitals in Hong Kong. Semi-structured, in-depth, one-to-one interviews were conducted 2017–2018. Data collection and thematic analysis were guided by the Breastfeeding Self-Efficacy Theory.Results:The authors conducted thematic analysis and identified six core themes: (1) perceived maternal roles; (2) breastfeeding role models; (3) negative feedback from social networks; (4) negative direct breastfeeding experiences; (5) expressed human milk feeding as a solution to a problem; and (6) advice from health care professionals to express human milk. These themes were consistent with the four antecedents of the Breastfeeding Self-Efficacy Theory (e.g., physiological and affective state, vicarious experiences, performance accomplishments, and verbal persuasion).Conclusions:The main reason for participants to feed expressed human milk was experiencing difficulties with direct breastfeeding. Expressed human milk feeding was used as an immediate solution for breastfeeding problems. Strengthening breastfeeding support in the early postpartum period may decrease the perceived need for human milk expression.

Journal of Human Lactation, Ahead of Print.
Background:The Baby-Friendly Hospital Initiative (BFHI) was launched in 1991 to promote breastfeeding through hospital policy. Researchers have reported breastfeeding improvements after hospitals became “Baby-Friendly.” In Hong Kong, the first public hospital was designated as a Baby-Friendly Hospital in 2016.Research Aim:To examine the influence of the BFHI on breastfeeding by comparing breastfeeding outcomes in a study cohort recruited before the implementation of the BFHI and a cohort recruited after its implementation.Methods:This was a quasi-experimental interrupted time-series design. Two cohorts of mother-infant pairs (N = 2369) were recruited immediately postpartum from four public hospitals in Hong Kong and followed up prospectively. Comparisons were made in five of the BFHI steps experienced in both cohorts and the duration of any and exclusive breastfeeding.Results:A higher proportion of participants from the post-implementation cohort breastfed and breastfed exclusively at all follow-up periods. Participants in the pre-BFHI cohort, on average experienced 3.10 (SD = 1.42) of the BFHI steps, whereas the participants in the post-BFHI cohort experienced 3.59 (1.09) of the BFHI steps. Half of the participants discontinued any breastfeeding by 13 weeks in the pre-BFHI cohort; more than half in the post-BFHI cohort were still breastfeeding at 6 months postpartum (p < .001). Giving only human milk in the first 48 hr of delivery and not providing pacifiers or bottles were associated with lower risk of not exclusive breastfeeding in both cohorts.Conclusion:Implementation of the BFHI was associated with improvements in breastfeeding practices and outcomes.

Journal of Human Lactation, Ahead of Print.
Background:The feeding patterns of healthy newborns have been poorly described.Research Aim:To determine the feeding patterns of healthy term newborns soon after birth, and if these differed with sex, gestation, and mode of birth.Methods:This study was a prospective, longitudinal observational cohort study. Term, appropriately grown newborns (N = 66) were fed according to maternal choice and details were recorded. Data were analyzed using generalized Poisson regression for feeding frequencies, and mixed model regression of log-transformed data for durations.Results:The participants completing the study had a M = 3589 g (SD = 348 g) birthweight, with a gestation age of M = 40.1 (1.2) weeks. All participants were breastfed; 23 (35%) also received expressed human milk and 10 (15%) received formula. Participants had fewer feeding sessions on Day 1, (M = 7.3 [1.9] sessions/day) increasing to (M = 9.4 [2.4] sessions/day) by Day 3, then reducing to (M = 9.0 [2.2] sessions/day) on Day 5, p < .001. The overall duration of breastfeeding sessions varied widely (Mdn = 29 [range = 1–447] min). Feed frequency but not duration was higher in males than females (M = 8.9, SE = 0.2 vs. 8.1, 02, sessions/day, p = .03), in newborns born ≥ 40 weeks’ gestation (M = 8.9, SE = 0.3 vs. 8.2, 02, sessions/day, p = .04), and in newborns born by Caesarean section (M = 9.4, SE = 0.3 vs. 8.4, 02, sessions/day, for vaginal birth, p = .003).Conclusion:Feeding patterns of healthy term newborns vary widely, but frequency increases during the first 3 days, and is greater in males, newborns born late term, and born by Caesarean section.Clinical Trial Registration:The Australian and New Zealand Clinical Trials Registry Ref: ACTRN12615000986572. The study protocol is available online: http://hdl.handle.net/2292/32066

Journal of Human Lactation, Ahead of Print.
Background:Because of its many benefits, exclusive breastfeeding for 6 months is a common public health goal. However, only 44% of infants aged 0–6 months are exclusively breastfed worldwide and, in the United States, only 26% of infants are exclusively breastfed for 6 months. The restrictions imposed during the COVID-19 pandemic may have reduced these rates even further.Research Aim:To examine the differences in breastfeeding exclusivity and satisfaction before and during the COVID-19 pandemic.Methods:A cross-sectional, two-group survey design was used. Parents (N = 110) of infants born April 1 to December 31, 2019 (pre-pandemic; n = 69), or April 1 to December 31, 2020 (during the pandemic; n = 41), who received lactation support services from an urban academic breastfeeding clinic were surveyed.Results:Respondents who gave birth in 2020 (pandemic year) were no less likely to exclusively breastfeed for the first 6 months of their infant’s life compared to respondents who gave birth in 2019 (pre-pandemic year). After multivariable logistic regression, the odds of high breastfeeding satisfaction were 73% lower in respondents with infants born in 2020 than in respondents with infants born in 2019 (OR = 0.27, 95% CI [0.08, 0.89]). The strongest contributor to high breastfeeding satisfaction was a prenatal breastfeeding visit with an International Board Certified Lactation Consultant.Conclusions:Future research is needed to identify the specific pandemic-related factors that led to the difference in breastfeeding satisfaction between the two groups and to confirm the impact of prenatal International Board Certified Lactation Consultant visits on breastfeeding satisfaction.

Journal of Human Lactation, Ahead of Print.
Background:Breastfeeding self-efficacy as a construct has been theoretically and empirically linked to exclusive breastfeeding in studies globally using the Breastfeeding Self-Efficacy Scale-Short Form (BSES-SF). However, its application in the Middle East and North Africa region is limited, as it has not been validated.Research Aims:To psychometrically validate the BSES-SF among a sample of mothers in the United Arab Emirates.Methods:We psychometrically evaluated the Arabic version of the BSES-SF using a sample of mothers (N = 457) residing in the United Arab Emirates. We used translation techniques, item-test and item-total correlations, confirmatory factor analysis, tests of reliability, and tests of validity.Results:Item-test correlations of scale items ranged from 0.67 to 0.84, while item-total correlations ranged from 0.58 to 0.81. The confirmatory factor model assessed the 14-item scale to be unidimensional with satisfactory model fit indices. Our findings suggested the Arabic-language version of the BSES-SF was a reliable measure (α = 0.95) with strong construct and discriminant validity. BSES-SF scores significantly predicted exclusive breastfeeding (aOR = 1.04; 95% CI [1.02, 1.08]) and exclusive duration (β = .06; 95% CI [0.4, 0.08]), which suggested strong predictive, validity after adjusting for parity, maternal age, maternal education, and study site.Conclusions:We have provided rigorous evidence that the BSES-SF is a valid and reliable measure of breastfeeding self-efficacy among Arabic-speaking women in the UAE. Interventions designed specifically to increase breastfeeding self-efficacy among Arabic-speaking women may be a mechanism to increase the suboptimal rates of breastfeeding exclusivity occurring in much of the MENA region.

Journal of Human Lactation, Ahead of Print.

Journal of Human Lactation, Ahead of Print.