Barriers and Facilitators in Lactation Support for the Preterm Mother-Infant Dyad: An Integrated Approach.

Breastfeeding offers significant health benefits for both mothers and infants, particularly preterm infants, where it serves as a therapeutic strategy to reduce mortality and morbidities. However, breastfeeding practices are threatened globally by societal norms and systemic barriers at both micro and macro levels. This paper explores the complex interplay of these barriers and facilitators, focusing on the Neonatal Intensive Care Unit (NICU) setting. Preterm infants face specific feeding challenges due to immature physiological functions, yet evidence supports that strategies like cue-based feeding and individualized care can enhance feeding success and health outcomes. For mothers, initiating and maintaining lactation after preterm birth is critical but challenging, with early lactation support and achieving sufficient milk volume being key predictors of success. Partner support significantly influences lactation outcomes, although more inclusive research is needed for diverse family structures. In the NICU, a multidisciplinary approach to lactation care is vital, emphasizing the need for experienced staff and family-centered practices. NICU design, policies promoting parental presence, and adherence to Baby-friendly Hospital Initiative guidelines further support breastfeeding. This paper aims to provide directives for local breastfeeding policies through an integrated approach, considering societal attitudes and healthcare practices. The findings advocate for improved lactation support in NICUs, inclusive language and policies, and further research into diverse familial and gender roles in breastfeeding.

Registered nurse lactation consultants' experiences supporting maternal mental health: A qualitative descriptive study.

BACKGROUND: The province of Nova Scotia has the highest rates of perinatal mental health disorders in Canada, and rates of exclusive breastfeeding fall below the Canadian national average. Exclusive breastfeeding is identified as a protective factor against the development of perinatal mental health disorders. Lactation consultant support is associated with increased rates of exclusive breastfeeding and decreased rates of perinatal mental health disorders. Despite this, little is known regarding the experiences of Registered Nurse Lactation Consultants related to supporting maternal mental health. OBJECTIVE: To understand the experiences of Registered Nurse Lactation Consultants related to supporting maternal mental health. DESIGN: A qualitative descriptive design using online semi-structured interviews. SETTING & PARTICIPANTS: Ten Registered Nurse Lactation Consultants employed in the publicly funded healthcare system in Nova Scotia, Canada, were recruited via purposive sampling. FINDINGS: Three themes emerged regarding the relational experiences of Registered Nurse Lactation Consultants while supporting maternal mental health; these included (1) Experiences supporting maternal mental health, (2) Providing maternal mental health care, and (3) Mothers need support. KEY CONCLUSIONS AND IMPLICATIONS FOR PRACTICE: Registered Nurse Lactation Consultants described positive experiences supporting maternal mental health and indicated that lactation consultant appointments were an opportune time to provide screening and support for maternal mental health. Enhancing support for maternal mental health requires collaborative and integrated approaches throughout the perinatal period. Healthcare providers, including Registered Nurse Lactation Consultants, must be provided with the support and resources to provide timely and appropriate support for maternal mental health throughout the perinatal period.

Maternal Immunization Decision-Making Among Pregnant and Lactating People in Kenya: A Qualitative Exploration of Peer Influences on Vaccine Decision-Making for a Future RSV Vaccine.

INTRODUCTION: Respiratory syncytial virus (RSV) is a leading cause of respiratory illness in infants globally, with new maternal RSV vaccines on the horizon. Vaccine decision-making during pregnancy is shaped by individual, interpersonal, community, and societal factors. This study explored key interpersonal influences on maternal vaccine decision-making among pregnant and lactating people (PLP) and community members in Kenya. METHODS: This qualitative study conducted in-depth interviews with six pregnant people, 18 lactating people, and 10 community members in one rural and one urban county in Kenya. Data were analyzed using a grounded theory approach. RESULTS: Participants identified the pregnant person themself, male partners, other family members, peers, and healthcare providers (HCPs) as key influences on the maternal immunization decision-making process. The majority of interviewed PLP believed that decision-making during pregnancy should be left to themselves due to autonomy and their role as the primary caregiver. Community members, including male partners, also identified pregnant people as the key decision-maker. While some PLP said they deferred to male partners to make vaccine decisions, more felt that men were not as informed on maternal and child issues as themselves or other female peers and relatives. HCPs emerged as important influences and information sources for PLP during decision-making. DISCUSSION: Understanding who influences vaccine-decision making during pregnancy will help inform demand generation strategies, and in turn, uptake of future maternal vaccines, including RSV vaccines. Given the strong role HCPs and peers have in the decision-making process, targeting key potential influences is essential to improve vaccine acceptance.

Understanding willingness and barriers to participate in clinical trials during pregnancy and lactation: findings from a US study.

BACKGROUND: Due to the exclusion of pregnant and lactating people from most clinical trials, there is an incomplete understanding of the risks and benefits of medication use in these populations and therapeutic decision-making is often conducted without adequate evidence. To change this paradigm, it is imperative to understand the perspectives of pregnant and lactating individuals concerning their participation in clinical trials. OBJECTIVES: To describe attitudes, perceptions, barriers, and preferences of pregnant and postpartum people in the United States (US) regarding participation in clinical trials and to identify factors influencing participation. METHODS: In November 2022, individuals aged ≥ 18 residing in the US who self-identified as pregnant or pregnant within the last 12 months were invited to complete an online survey about their perspectives regarding clinical trial participation. The survey included questions about demographic characteristics, health history, behaviors, and willingness to participate in clinical trials while pregnant and/or lactating. Multivariable logistic regression models were fit to identify predictors of clinical trial participation. RESULTS: Among the 654 respondents, 34.8% and 40.9% reported being likely or extremely likely to participate in a clinical trial for a new medication while pregnant or lactating, respectively; and 24.5% and 41.7% for a new vaccine while pregnant or lactating, respectively. Higher educational attainment (≥ Bachelor's degree) was associated with greater likelihood of clinical trial participation in pregnancy (odds ratio (OR) = 1.50, 95% Confidence Interval (CI): 1.01, 2.25 for medications; OR = 2.00, 95% CI: 1.28, 3.12 for vaccines). Chronic medical conditions were associated with a greater likelihood of participation in clinical trials for vaccines during lactation (OR = 1.59, 95% CI: 1.07, 2.36). The most cited motivator for participation in a clinical trial while pregnant or lactating was anticipated personal medical benefit (85.8% and 75.6%, respectively), while the primary deterrent was possible risk to the fetus or baby (97.9% and 97.2%, respectively). CONCLUSIONS: Willingness of a US sample to participate in clinical trials while pregnant or lactating varied by demographics and health status, with safety to the fetus being a nearly universal concern. These findings have implications for enhancing inclusion of pregnant and lactating people in clinical research and developing effective and equitable recruitment strategies.

Do inexperienced nurses in the lactation period experience workplace violence? A qualitative study.

Introduction: Among clinical healthcare personnel, nurses face the highest proportion of workplace violence, which has a significant impact on their physical and mental well-being as well as their personal and professional lives. However, little is known about the effects of workplace violence on inexperienced breastfeeding nurses and their experiences during and after breastfeeding when they return to work. This study aimed to explore the experiences of inexperienced breastfeeding nurses who encountered workplace violence and its resulting impacts. Methods: This study employed a descriptive qualitative design. Semi-structured in-depth interviews were conducted with 20 nurses working in various positions and departments at three tertiary hospitals. Purposive and maximum variation sampling techniques were employed. The interview data were analyzed using Colaizzi's method, and the research findings were reported according to Consolidated Criteria for Reporting Qualitative Studies (COREQ)standards. Results: Inferences regarding workplace violence and risks for inexperienced breastfeeding nurses included physical labor (such as lifting heavy objects and performing cardiopulmonary resuscitation), conflicts, inadequate job skills, role confusion, occupational exposure risks, patient violence, and pressure from older adults. An inductive thematic investigation revealed the "Challenges faced during breastfeeding," "Conflicting professional and family roles," "Out of balance," and "Coping strategies." Conclusion: Inexperienced breastfeeding nurses experience several negative consequences due to workplace violence. Therefore, it is essential to plan and implement preventive strategies and management programs that specifically target workplace violence among inexperienced breastfeeding nurses.

Assessment of educational technology in lactation physiology by health students.

OBJECTIVES: to assess the suitability, facilitators, and barriers of using a video clip for teaching lactation physiology to health students. METHODS: a cross-sectional study was conducted with online data collection at a higher education institution, using the Assistive Technology Assessment Instrument and open-ended questions. The sample consisted of 88 students. RESULTS: the video clip was deemed suitable in all attributes. Facilitators identified included attractiveness, musicality, and ease of access. Barriers noted were the music's speed and the necessity for prior knowledge. The video clip achieved adequate scores for interactivity (1.71), purpose (1.77), relevance (1.64), and clarity (1.77). The overall average of the attributes was 1.72. CONCLUSIONS: the video clip can serve as an effective learning strategy to enhance hybrid education, potentially contributing to the promotion and support of breastfeeding. However, some barriers underscore the importance of prior knowledge for a complete understanding of the content.

The impact of continuous and intermittent supportive counseling on self-efficacy and continuation of breastfeeding in lactating women affected by COVID-19: a quasi-experimental trial.

BACKGROUND: Promoting exclusive breastfeeding can have a great effect in reducing the complications and mortality rate of mother and child. OBJECTIVE: The study aimed to compare the effects of continuous and intermittent supportive counselling on the self-efficacy and continuity of breastfeeding among Lactating mothers with COVID-19. METHODS: The study was a semi-experimental research method and was conducted on 73 mothers with COVID-19 who were hospitalized in Ayatollah Mousavi Hospital in Zanjan, Iran from May 2021 to April 2022. In the continuous counselling group, counselling was provided daily for 14 days, while in the intermittent counselling group, counselling was provided once a week for four weeks. Breastfeeding continuity was assessed based on the World Health Organization's classification, and breastfeeding self-efficacy was measured using Dennis' standard breastfeeding self-efficacy questionnaire (BSE) up to four months after delivery. The data were analyzed using chi-square tests, independent t-tests, paired t-tests, analysis of variance with repeated measures, and survival analysis (Kaplan-Meier) with a 95% confidence level. RESULTS: The survival analysis revealed that the cessation of exclusive breastfeeding occurred in 17 cases within the continuous counselling group and in 22 cases within the intermittent counselling group. The rates of continuation for exclusive breastfeeding were 52.8% and 40.5% in the continuous and intermittent counselling group respectively. However, no statistically significant differences were observed in the continuation of breastfeeding and the trend of changes in the mean scores of breastfeeding self-efficacies between the continuous and intermittent counselling groups. Furthermore, comparing the change in breastfeeding self-efficacy scores between the one-month and four-month follow-ups within the continuous counselling group, a statistically significant increase was observed. CONCLUSION: The results indicated no difference in the effectiveness of continuous and intermittent counseling methods in improving breastfeeding continuity in women with COVID-19. Further research is needed to explore the long-term effects of different counseling approaches on breastfeeding outcomes during crises. TRIAL REGISTRATION: The study was registered on the Iranian Registry of Clinical Trials website on 29/06/2021 with the registration code IRCT20150731023423N19. It can be accessed via this link: https://irct.behdasht.gov.ir/user/trial/55391/view .

Factors influencing the participation of pregnant and lactating women in clinical trials: A mixed-methods systematic review.

BACKGROUND: Poor representation of pregnant and lactating women and people in clinical trials has marginalised their health concerns and denied the maternal-fetal/infant dyad benefits of innovation in therapeutic research and development. This mixed-methods systematic review synthesised factors affecting the participation of pregnant and lactating women in clinical trials, across all levels of the research ecosystem. METHODS AND FINDINGS: We searched 8 databases from inception to 14 February 2024 to identify qualitative, quantitative, and mixed-methods studies that described factors affecting participation of pregnant and lactating women in vaccine and therapeutic clinical trials in any setting. We used thematic synthesis to analyse the qualitative literature and assessed confidence in each qualitative review finding using the GRADE-CERQual approach. We compared quantitative data against the thematic synthesis findings to assess areas of convergence or divergence. We mapped review findings to the Theoretical Domains Framework (TDF) and Capability, Opportunity, and Motivation Model of Behaviour (COM-B) to inform future development of behaviour change strategies. We included 60 papers from 27 countries. We grouped 24 review findings under 5 overarching themes: (a) interplay between perceived risks and benefits of participation in women's decision-making; (b) engagement between women and the medical and research ecosystems; (c) gender norms and decision-making autonomy; (d) factors affecting clinical trial recruitment; and (e) upstream factors in the research ecosystem. Women's willingness to participate in trials was affected by: perceived risk of the health condition weighed against an intervention's risks and benefits, therapeutic optimism, intervention acceptability, expectations of receiving higher quality care in a trial, altruistic motivations, intimate relationship dynamics, and power and trust in medicine and research. Health workers supported women's participation in trials when they perceived clinical equipoise, had hope for novel therapeutic applications, and were convinced an intervention was safe. For research staff, developing reciprocal relationships with health workers, having access to resources for trial implementation, ensuring the trial was visible to potential participants and health workers, implementing a woman-centred approach when communicating with potential participants, and emotional orientations towards the trial were factors perceived to affect recruitment. For study investigators and ethics committees, the complexities and subjectivities in risk assessments and trial design, and limited funding of such trials contributed to their reluctance in leading and approving such trials. All included studies focused on factors affecting participation of cisgender pregnant women in clinical trials; future research should consider other pregnancy-capable populations, including transgender and nonbinary people. CONCLUSIONS: This systematic review highlights diverse factors across multiple levels and stakeholders affecting the participation of pregnant and lactating women in clinical trials. By linking identified factors to frameworks of behaviour change, we have developed theoretically informed strategies that can help optimise pregnant and lactating women's engagement, participation, and trust in such trials.

The Impact of Religious Beliefs on Early Lactation in Israeli Mothers.

Objective: To explore the influence of religious beliefs and faith on breastfeeding initiation among mothers in Israel. Materials and Methods: The study, conducted from February 2022 to July 2023 at Bnai Zion Medical Center (located in Haifa district) and Laniado hospital (located in Netanya, Sharon plain), included mothers and their partners who voluntarily completed questionnaires. The survey, comprising 26 questions, delves into religion, faith, religiosity, and infant feeding approaches, while considering various socioeconomic and health-related factors. Results: Religious and secular mothers exhibited a higher inclination toward exclusive breastfeeding compared with the traditional mothers (p < 0.001). Notably, more maternal education years were associated with more exclusive breastfeeding (odds ratio [OR] 1.59; 95% confidence interval [CI] 1.09-2.32; p = 0.017). However, older age of youngest sibling (OR 0.56; 95% CI 0.32-0.98; p = 0.041), cesarean delivery (OR 0.64; 95% CI 0.44-0.94; p = 0.023), and no desire to breastfeed during pregnancy (OR 0.67; 95% CI 0.57-0.80; p < 0.001) emerged as significant factors decreasing exclusive breastfeeding. Conclusion: The study indicates that the level of religiosity and prenatal intention to breastfeed impact breastfeeding practices, along with maternal education, age of the youngest sibling, and delivery mode. These insights provide valuable guidance for initiatives aimed at boosting breastfeeding rates, particularly in sectors where rates are comparatively low.

Dysphoric Milk Ejection Reflex: Characteristics, Risk Factors, and Its Association with Depression Scores and Breastfeeding Self-Efficacy.

Background: Dysphoric milk ejection reflex (D-MER) is a phenomenon that occurs before milk letdown and is described as a wave of negative or devastating emotions, ranging from mild to severe and lasting for seconds to minutes. To date, there has been little research regarding this phenomenon. This study aims to determine the prevalence of D-MER in our population as well as its association with postnatal depression scores and breastfeeding self-efficacy. Methods: Lactating persons between 4 and 12 weeks postpartum at our institution were invited to complete an anonymous 59-question survey via an online platform. Questions asked included patient demographics, presence of symptoms of dysphoria (including timing, duration, and frequency), the Edinburgh Postnatal Depression Scale (EPDS), and the Breastfeeding Self-Efficacy Scale Short Form (BSES-sf). Results: In total, 201 women completed the survey. Twelve women were classified as likely having D-MER (6%). Symptom resolution primarily occurred within a minute to 5 minutes (58%). Mean EPDS scores differed significantly between those with likely D-MER and those without (12.2 vs. 5.4, p = 0.002). BSES-sf scores differed significantly between the two groups (43.1 vs. 52.5, p = 0.009). Preexisting depression or anxiety was not associated with D-MER (p = 0.133), other reported mood disorders differed significantly between those with D-MER and those without (p = 0.004). Demographic characteristics of women with and without D-MER were similar. Conclusion: D-MER prevalence may be lower than previously reported. Patients with likely D-MER appear to have lower breastfeeding self-efficacy and higher depression scores. Those with preexisting mood disorders may be at higher risk of experiencing D-MER.

Breastfeeding, Chestfeeding, and Lactating Parents' Experiences With Online Support Groups: An Integrative Review.

INTRODUCTION: The aim of this integrative review is to understand (1) how parents in specific populations engage with online breastfeeding, chestfeeding, or lactation support groups, (2) how these support groups influence extended breastfeeding duration and other outcomes, and (3) whether the use of support groups by these specific populations has changed since the start of the COVID-19 pandemic. METHODS: Of the articles identified across 4 electronic databases, 10 studies met the inclusion criteria; they were published between 2013 and 2023, written in English, and focused on the use of online peer support groups for breastfeeding, chestfeeding, and lactation support in specific populations. Eight of these studies are qualitative, 1 is a randomized controlled trial, and 1 is mixed methods. RESULTS: Eight themes were identified: (1) overcoming lack of real world support, (2) normalization, (3) practical support, (4) emotional support and shared experiences, (5) building a bridge to in-person relationships, (6) reciprocity and activism, (7) self-efficacy and outcomes, and (8) issues with online support groups. DISCUSSION: Specific subpopulations of breastfeeding, chestfeeding, and lactating parents and their partners found comfort in online support groups because they normalized more unique feeding practices and offered a space to provide and receive encouragement. Additionally, this review includes fathers/partners as a previously ignored subpopulation who benefit from education and support with breastfeeding, chestfeeding, and lactation. This subpopulation is also an area for expanded research on the use of online support groups by partners of lactating parents.

Dysphoric Milk Ejection Reflex in Human Lactation: An Integrative Literature Review.

BACKGROUND: Dysphoric Milk Ejection Reflex is an understudied condition of lactation involving emotional dysregulation during letdown or milk ejection. Affected individuals may experience transient feelings of helplessness, melancholy, and general unhappiness. RESEARCH AIM: To evaluate the scope of published literature on Dysphoric Milk Ejection Reflex. METHOD: Whittemore and Knafl's methodology guided this integrative review. Five databases were searched for primary research, summaries, and editorials on Dysphoric Milk Ejection Reflex in lactating individuals. Literature searched also included websites, pamphlets, and conference proceedings via Google and Google Scholar. A total of 11 articles, from five different countries, met inclusion criteria for review. RESULTS: Studies on Dysphoric Milk Ejection Reflex and negative emotional sensations during lactation were synthesized under five conceptual umbrellas: (1) Experiences, Sensations, and Symptom Management; (2) Biological Underpinnings; (3) Influence on Maternal Role and Breastfeeding Self-Efficacy; (4) Support, Understanding, and Awareness; and (5) Reduction and Cessation of Breastfeeding. CONCLUSION: Dysphoric Milk Ejection Reflex is a neurobiological condition characterized by low mood and negative feelings during milk ejection throughout lactation. Dysphoric Milk Ejection Reflex is linked to maternal psychological distress and breastfeeding discontinuation. Priority areas for future research include biological origins and interventions aimed at prevention, symptom control, and greater awareness of the condition on a more international scope.

Facilitators and Barriers of Human Milk Donation.

PURPOSE: The purpose of this study is to examine perceptions and experiences of women who donate human milk and highlight various aspects of the breast milk donation process. STUDY DESIGN: A cross-sectional descriptive study. METHODS: An online survey was conducted with a convenience sample of women who donated milk at several milk banks in the United States. A questionnaire of 36 closed and open-ended items were developed and validated by the research team. Descriptive statistics and content analysis were used. Semantic content analysis involved three procedures: coding, categorizing text units, and refining the identified themes. RESULTS: A total of 236 women who donated breast milk completed the questionnaire. Mean age of participants was 32.7±4.27 and 89.40% were non-Hispanic White women with a bachelor's degree (32.20%) or graduate degree (54.70%). Most participants were women who actively donated breast milk, ranging from one to four times. Two themes, facilitators and barriers of milk donation, were identified. Facilitators to milk donation included attitudes toward milk donation, commitment for donating, motivation in donating, and support. Barriers included personal factors, environment, milk donor process, and psychosocial factors. CLINICAL IMPLICATIONS: Nurses, health care providers, and lactation professionals should educate women about milk donation resources and opportunities. Strategies to increase awareness about milk donation among underrepresented groups such as women of color are highly recommended. Future research is needed to further explore specific factors that increase milk donation awareness and minimize barriers to potential donors.

Perspectives From a Career in Breastfeeding Research, Mentorship, and Advocacy: An Interview With Karen Wambach.

Karen Wambach recently retired from a distinguished career in nursing education and breastfeeding research in the United States, practicing her craft during the formative years of the field of lactation consulting. Her research focused on the description of biopsychosocial influences on breastfeeding initiation and duration, as well as interventions for promoting and supporting breastfeeding among vulnerable childbearing populations, for example, adolescent mothers. Her research career trajectory mirrors the development of breastfeeding research more broadly. She began with descriptive studies and theory testing, which included the development of the Breastfeeding Experience Scale quantifying early breastfeeding problems. She then moved on to randomized clinical trials of breastfeeding education/support for adolescent mothers, and finished her funded research using a multi-behavioral, technology-based education and support intervention to promote breastfeeding, healthy lifestyle, and depression prevention in adolescent mothers. As researcher and educator in a clinical science area, she has supported evidence-based practice and translational science through her work as lead editor of many editions of the textbook Breastfeeding and Human Lactation. She is a consummate teacher, having mentored many upcoming researchers during her teaching career, and directed the undergraduate nursing honors program and PhD program at the University of Kansas School of Nursing in the United States. She also believes in serving her profession and has been an active member of American Academy of Nursing, the Midwest Nursing Research Society, the Association of Women's Health, Obstetric, and the Neonatal Nursing and the International Lactation Consultant Association, including serving on JHL's Editorial Review Board for many years. (This conversation was recorded on October 14, 2022 then transcribed and edited for readability. EC = Ellen Chetwynd; KW = Karen Wambach).

Dysphoric milk ejection reflex (D-MER) and its implications for mental health nursing.

Dysphoric milk ejection reflect (D-MER) is a dysphoria which women may experience within seconds of commencing breastfeeding. It is only recently gaining recognition in the academic literature and may have important implications for breastfeeding continuation, differential diagnosis and perinatal mental health. This perspective piece introduces the topic, sets out the physiological processes underpinning the experience and outlines why increased awareness of D-MER is important for the profession of mental health nursing.

Mothers, milk and mourning: The meanings of breast milk after loss of an infant.

Breast milk is a highly valued substance, immunologically and nutritionally, which also signifies maternal care and love for the infant. This intersection of biological and cultural qualities confers breast milk with complex meanings, which necessarily shape the experience of breastfeeding. Our research, investigating the experience of lactation after the loss of an infant, casts a novel light on these meanings. This article analyses the experience of 17 Australian bereaved mothers and 114 health professionals charged with their care. We find that while all the mothers found post-loss lactation emotionally painful, many also found redemptive meaning in their milk-production, as a bond with the lost child, as confirmation of their maternal competence and as a life giving substance that they could donate to other needy infants. These complex meanings and positive connotations were at odds with hospital cultures that regard post-loss lactation as valueless and best dealt with through medical suppression, despite the more complex insights of individual health-care professions.

Initiation of lactation and the provision of human milk to preterm infants in German neonatal intensive care units from the mothers' perspective.

BACKGROUND: If infants with a very low birth weight (VLBW) are to be fed exclusively with human milk, it is essential to focus on lactation initiation. The aim of the study is to learn more about the current state of lactation initiation and human milk provision in neonatal intensive care units in Germany from the mothers' perspective. METHODS: Written surveys were conducted with mothers of VLBW infants to learn more about the timing of initiation of lactation, pumping frequency during the first three days postpartum and feeding of the preterm infant during hospitalisation. RESULTS: The data of 437 mothers (response rate: 44.7%) were included in the analyses. Of these, only 7.8% stated that they had initiated lactation immediately after delivery and 38.2% within 6 h. In terms of pumping frequency, 50.1% pumped 7-9 times a day within the first 3 days postpartum; 60.9% reported that their infant received formula feedings during the hospital stay. CONCLUSION: Overall, deficits were still evident with regard to the initiation of lactation in mothers of VLBW infants in Germany, resulting in a large proportion of VLBW infants receiving formula in the hospital. TRIAL REGISTRATION: German Clinical Trial Register: DRKS00017755 .

Maternal Psychological Distress and Lactation and Breastfeeding Outcomes: a Narrative Review.

PURPOSE: Despite recommendations from the World Health Organization and the American Academy of Pediatrics to exclusively breastfeed infants for their first 6 months of life, 75% of women do not meet exclusive breastfeeding guidelines, and 60% do not meet their own breastfeeding goals. Numerous observational studies have linked maternal psychological distress (eg, perceived stress, anxiety, and depression) with nonoptimal breastfeeding outcomes, such as decreased proportion and duration of exclusive breastfeeding. The physiological mechanisms underlying these associations, however, remain unclear. METHODS: For this narrative review, we evaluated the evidence of relationships between maternal psychological distress and lactation and breastfeeding outcomes in pregnancy and post partum and the possible physiological mechanisms that facilitate these relationships. We searched PubMed using the following terms: stress, anxiety, depression, breastfeeding, and lactation. Additional search by hand was conducted to ensure a thorough review of the literature. FINDINGS: Among the studies examined, methods used to assess maternal psychological distress were not uniform, with some studies examining perceived distress via a variety of validated tools and others measuring biological measures of distress, such as cortisol. Evidence supports a role for psychological distress in multiple breastfeeding outcomes, including delayed secretory activation and decreased duration of exclusive breastfeeding. One physiological mechanism proposed to explain these relationships is that psychological distress may impair the release of oxytocin, a hormone that plays a critical role in milk ejection during lactation. Continued impairment of milk ejection may lead to decreased milk production because of incomplete emptying of the breast during each feed. Maternal distress may also yield elevated levels of serum cortisol and decreased insulin sensitivity, which are associated with decreased milk production. The relationship between psychological distress and breastfeeding is likely to be bidirectional, however, in that breastfeeding appears to reduce maternal distress, again possibly via effects on the pleasure or reward pathway and calming effects of oxytocin on the mother. This finding suggests that interventions to support lactation and breastfeeding goals in women who score high on measures of psychological distress would be beneficial for both maternal and infant well-being. IMPLICATIONS: Evidence to date suggests that maternal psychological distress may impair lactation and breastfeeding outcomes, but stronger study designs and rigorous assessment methods are needed. A better understanding of the physiological mechanisms leading to impaired lactation may assist in the development of early interventions for mothers experiencing distress. In addition, stress-reducing programs and policies should be investigated for their potential to improve breastfeeding outcomes.

Alveolar progenitor differentiation and lactation depends on paracrine inhibition of notch via ROBO1/CTNNB1/JAG1.

In the mammary gland, how alveolar progenitor cells are recruited to fuel tissue growth with each estrus cycle and pregnancy remains poorly understood. Here, we identify a regulatory pathway that controls alveolar progenitor differentiation and lactation by governing Notch activation in mouse. Loss of Robo1 in the mammary gland epithelium activates Notch signaling, which expands the alveolar progenitor cell population at the expense of alveolar differentiation, resulting in compromised lactation. ROBO1 is expressed in both luminal and basal cells, but loss of Robo1 in basal cells results in the luminal differentiation defect. In the basal compartment, ROBO1 inhibits the expression of Notch ligand Jag1 by regulating ß-catenin (CTNNB1), which binds the Jag1 promoter. Together, our studies reveal how ROBO1/CTTNB1/JAG1 signaling in the basal compartment exerts paracrine control of Notch signaling in the luminal compartment to regulate alveolar differentiation during pregnancy.

Assessment of Adherence to the Healthy Food Pyramid in Pregnant and Lactating Women.

There are numerous dietary recommendations during pregnancy. However, there are limited recommendations during the lactation period, a nutritionally vulnerable period for women. The Mediterranean Diet and adherence to the Healthy Food Pyramid (HFP) is considered as the standard for healthy eating. In this study, we investigated the differences in adherence to the HFP in pregnant, lactating, and non-pregnant/non-lactating (NPNL) women concerning sociodemographic factors. A sociodemographic and nutritional and lifestyle questionnaire (AP-Q) were used to assess adherence to the HFP, including lifestyle. The AP-Q score ranges from 0 to 10 meaning the higher the score, the greater the adherence to the HFP. Lactating women had the lowest AP-Q score (6.13 [5.31; 6.82]) compared to the pregnant (6.39 [5.56; 7.05]) and NPNL women (6.27 [5.43; 6.88]), while pregnant women had the highest scores. Maternal age was positively correlated with AP-Q score in pregnant (rho = 0.22; p-Value < 0.001) and lactating women (rho = 0.18; p-Value < 0.001), but not in NPNL women. Educational level and monthly income had a positive influence on the degree of adherence to the HFP. In conclusion, breastfeeding mothers of young age and low socioeconomic and educational level would be the target population to carry out nutritional interventions that improve their adherence to the HFP. The knowledge gained from this study can help to design recommendation guidelines and nutritional educational interventions for a given population.