The effects of music ıntervention on breast milk production in breastfeeding mothers: A systematic review and meta-analysis of randomized controlled trials

Nurse and midwife interventions to protect, promote and support breastfeeding: An umbrella review

BACKGROUND

Low breastfeeding rates continue to be a global concern among nurses and midwives, raising critical questions about knowledge and effectiveness in promoting breastfeeding. Summarising evidence on nursing and midwifery interventions to protect, promote, and support breastfeeding enables a deeper understanding of how these professionals can enhance breastfeeding practices, inform decision-makers, and improve care quality.

AIM

To synthesise nursing and midwifery interventions that protect, promote, and support breastfeeding.

METHODS

The JBI methodology for umbrella reviews guided this study. Searches were conducted in databases aggregated by EBSCOhost, SCOPUS, and Web of Science, as well as relevant grey literature. Systematic reviews published in English, Portuguese, and Spanish from January 2018 to December 2023 were included. Two independent reviewers used a JBI critical appraisal tool and a specific data extraction instrument to synthesise findings.

FINDINGS

A total of 29 studies met the inclusion criteria. Synthesised findings include: (1) the absence of nursing/midwifery interventions focused on breastfeeding protection; (2) five nursing/midwifery interventions aimed at breastfeeding promotion, with the primary intervention being prenatal education; and (3) twenty-four interventions of nurses/midwives on breastfeeding support, the most frequent being home visits, telephone technology and follow-up.

CONCLUSION

This umbrella review reveals limited involvement of nurses/midwives in breastfeeding protection, despite their expertise and potential influence on policy development to support breastfeeding. They are involved in breastfeeding promotion, but most of their intervention is focused on breastfeeding support. The diverse roles and settings of nursing and midwifery practice present challenges in evaluating intervention effectiveness. Further research specific to nursing and midwifery is needed to inform evidence-based practice and policymaking in breastfeeding care.

Breastfeeding interventions for preventing postpartum depression

BACKGROUND

Postpartum depression is a debilitating mental health disorder, which occurs in approximately 6% to 13% of women who give birth in high-income countries. It is a cause of great suffering for women and can have long-term consequences for child development. Postpartum depression can also negatively influence breastfeeding duration and breastfeeding exclusivity (i.e. feeding the infant only breast milk). However, a positive early, and continued, breastfeeding experience may reduce the risk of having postpartum depression. Breastfeeding interventions that increase the duration and exclusivity of breastfeeding may help prevent or reduce postpartum depressive symptoms.

OBJECTIVES

The primary objective of this review was to assess the effect (benefits and harms) of breastfeeding support interventions, in comparison to standard perinatal care, on maternal postpartum depression. The secondary objective was to assess whether breastfeeding support interventions had an effect on depression symptoms, and whether the effect was dependent on the duration and exclusivity of breastfeeding.

SEARCH METHODS

We searched CENTRAL (Wiley), MEDLINE ALL (Ovid), Embase (Ovid), PsycINFO (Ovid), CINAHL Complete (Ebsco) and several other bibliographic databases and trial registers. The most recent search was conducted in June 2024.

SELECTION CRITERIA

Randomised controlled trials (RCTs) that evaluated educational, psychosocial, pharmacological, alternative (any breastfeeding support intervention that promotes relaxation and reduces stress) or herbal breastfeeding support interventions targeting the prevention or reduction of postpartum depression were eligible for inclusion.

DATA COLLECTION AND ANALYSIS

Each title and abstract we identified was screened by two authors independently. Two review authors then independently examined full-text manuscripts to decide if the study met the inclusion criteria. If so, they extracted data from included studies using Covidence software. Two review authors also independently conducted a risk of bias assessment of each study using the RoB 2 tool. We contacted study authors when necessary for more information. We conducted meta-analyses using a random-effects model.

MAIN RESULTS

We included 10 RCTs with 1573 participants in this review. Depression was measured using the Edinburgh Postnatal Depression Scale (EPDS) in all studies, where scores range between 0 and 30 (higher scores indicating more depressive symptoms). The studies used a score of over 10 as the cut-off for a diagnosis of depression. Primary outcome It is very uncertain whether psychosocial breastfeeding interventions had any effect on the incidence of postpartum depression immediately post-intervention (RR 0.78, 95% CI 0.23 to 2.70; 1 study, 30 participants), but we found low-certainty evidence that psychosocial breastfeeding interventions may prevent the incidence of postpartum depression in the short term (one to three months) post-intervention (risk ratio (RR) 0.37, 95% confidence interval (CI) 0.14 to 0.93; 1 study, 82 participants). It is very uncertain whether alternative breastfeeding interventions had any effect in preventing the incidence of postpartum depression immediately post-intervention (RR 0.64, 95% CI 0.27 to 1.54; 1 study, 60 participants). The short-term time point was not measured. Secondary outcomes It is very uncertain whether psychosocial breastfeeding interventions had any effect on reducing depressive symptoms immediately post-intervention (mean difference (MD) -0.67, 95% CI -1.63 to 0.28; 4 studies, 512 participants). There is very low-certainty evidence that psychosocial breastfeeding interventions could reduce symptoms of anxiety immediately post-intervention as measured with the Zung Self-rating Anxiety Scale (SAS), where scores between 45 and 59 out of 80 on the SAS indicate mild to moderate anxiety, scores between 60 and 74 marked severe anxiety levels and > 75 extreme anxiety levels (MD -2.30, 95% CI -4.36 to -0.24; 1 study, 100 participants). There was no difference in rates of exclusive breastfeeding immediately post-intervention between those offered a psychosocial breastfeeding intervention and those receiving standard care, but the evidence is very uncertain (RR 1.20, 95% CI 0.96 to 1.51; I2 = 29%; 571 participants; very low-certainty evidence). We found low-certainty evidence that a psychosocial breastfeeding intervention may increase the duration of breastfeeding in the long term (RR 1.64, 95% CI 1.08 to 2.50; 129 participants; low-certainty evidence). For the comparison of alternative breastfeeding intervention versus standard care (which was evaluated in only one study), there was no difference between groups immediately post-intervention in anxiety measured with the State-Trait Anxiety Inventory (STAI); range 20 to 80; higher scores indicate more severe anxiety symptoms (MD 1.80, 95% CI -9.41 to 13.01; 60 participants; very low-certainty evidence), or in stress measured with the Perceived Stress Scale (PSS)-NICE; range 1 to 230, higher scores indicate higher levels of stress (MD 1.90, 95% CI -10.28 to 14.08; 60 participants; very low-certainty evidence), but the evidence is very uncertain. No adverse events connected to the intervention itself were stated in any of the trials, but for most studies, we do not know if this is because there were none or because they were not measured or reported.

AUTHORS' CONCLUSIONS

There is low-certainty evidence that psychosocial breastfeeding interventions may prevent postpartum depression in the short term and increase the duration of breastfeeding in the long-term. The evidence is very uncertain about the effect of psychosocial breastfeeding interventions on other outcomes. The evidence is very uncertain about the effect of alternative breastfeeding interventions on postpartum depression or other outcomes. The included studies did not report any adverse events directly related to the interventions, but it is not clear if this outcome was measured in most studies. Future trials of breastfeeding interventions should be conducted carefully to reduce their risk of bias, and they should be large enough to detect differences between mothers in their mental health.

The contributions of parental lactation on offspring development: It's not udder nonsense!

The Developmental Origins of Health and Disease (DOHaD) hypothesis describes how maternal stress exposures experienced during critical periods of perinatal life are linked to altered developmental trajectories in offspring. Perinatal stress also induces changes in lactogenesis, milk volume, maternal care, and the nutritive and non-nutritive components of milk, affecting short and long-term developmental outcomes in offspring. For instance, selective early life stressors shape the contents of milk, including macro/micronutrients, immune components, microbiota, enzymes, hormones, milk-derived extracellular vesicles, and milk microRNAs. In this review, we highlight the contributions of parental lactation to offspring development by examining changes in the composition of breast milk in response to three well-characterized maternal stressors: nutritive stress, immune stress, and psychological stress. We discuss recent findings in human, animal, and in vitro models, their clinical relevance, study limitations, and potential therapeutic significance to improving human health and infant survival. We also discuss the benefits of enrichment methods and support tools that can be used to improve milk quality and volume as well as related developmental outcomes in offspring. Lastly, we use evidence-based primary literature to convey that even though select maternal stressors may modulate lactation biology (by influencing milk composition) depending on the severity and length of exposure, exclusive and/or prolonged milk feeding may attenuate the negative in utero effects of early life stressors and promote healthy developmental trajectories. Overall, scientific evidence supports lactation to be protective against nutritive and immune stressors, but the benefits of lactation in response to psychological stressors need further investigation.

Infant feeding experiences and concerns among caregivers early in the COVID-19 State of Emergency in Nova Scotia, Canada

The global emergency caused by the novel coronavirus (COVID-19) pandemic has impacted access to goods and services such as health care and social supports, but the impact on infant feeding remains unclear. Thus, the objective of this study was to explore how caregivers of infants under 6 months of age perceived changes to infant feeding and other food and health-related matters during the COVID-19 State of Emergency in Nova Scotia, Canada. Four weeks after the State of Emergency began, between 17 April and 15 May 2020, caregivers completed this online survey, including the Perceived Stress Scale. Participants (n = 335) were 99% female and mostly White (87%). Over half (60%) were breastfeeding, and 71% had a household income over CAD$60,000. Most participants (77%) received governmental parental benefits before the emergency, and 59% experienced no COVID-19-related economic changes. Over three quarters of participants (77%) scored moderate levels of perceived stress. Common themes of concern included social isolation, COVID-19 infection (both caregiver and infant), and a lack of access to goods, namely, human milk substitutes ('infant formula'), and services, including health care, lactation support, and social supports. Most COVID-19-related information was sought from the internet and social media, so for broad reach, future evidence-based information should be shared via online platforms. Although participants were experiencing moderate self-perceived stress and shared numerous concerns, very few COVID-19-related changes to infant feeding were reported, and there were few differences by socio-economic status, likely due to a strong economic safety net in this Canadian setting.