The Association of Low Social Support with Breast Milk Expression in Low-Income Mother-Preterm Infant Dyads

Mothers' experiences of breast milk expression during separation from their hospitalized infants: a systematic review of qualitative evidence

BACKGROUND

Mother-infant separation, which is occurring with an increasing incidence, is a barrier to direct breastfeeding. Owing to the importance of breast milk to hospitalized infants, mothers are actively encouraged to express milk during their infants' neonatal intensive care unit (NICU) stay. However, mothers are often faced with a number of challenges in this process. There is a need to understand such mothers' real-life experiences of breast milk expression to develop supportive strategies to reduce the burden on mothers and increase breastfeeding rates.

METHODS

A comprehensive search of 12 databases was conducted for relevant studies published from database construction to December 2022. All qualitative and mixed-method studies published in English and Chinese that reported on mothers' experiences of human milk expression during separation from their hospitalized infants were included. Two reviewers independently conducted screening, data extraction, and quality appraisal, with disagreements resolved by a third reviewer. The process of searching followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) recommendations. The JBI Qualitative Assessment and Review Instrument was used to assess study quality and the credibility of study findings. Meta-aggregation was performed to integrate the results.

RESULTS

This systematic review aggregated mothers' experiences of milk expression during separation from their hospitalized infants. Database search yielded 600 records, of which 19 full-text documents were screened. Finally, 13 studies of good quality were included with data from 332 mothers across seven countries. A total of 61 primary findings with illustrations were extracted from the 13 eligible studies, the findings were generalized into 16 categories, and further were concluded as four synthesized findings: purpose and motivation, physical and emotional experiences, barrier factors, and coping styles.

CONCLUSION

Mothers were driven by extrinsic motivation in their decision to express breast milk. They experienced physical exhaustion and many negative emotional feelings while expressing. This process was affected by numerous barriers. Social support was essential to the initiation and maintenance of milk expression. Medical staff and families should pay more attention to the mental health of mothers with infants in the NICU. Future research should incorporate strategies to cope with emotional responses and offer practical strategies for managing milk expression.

SYSTEMATIC REVIEW REGISTRATION

[ www.crd.york.ac.uk ], identifier [PROSPERO 2022 CRD42022383080].

Understanding the Domains of Experiences of Black Mothers with Preterm Infants in the United States: A Systematic Literature Review

OBJECTIVE

To report the domains of Black mothers' experiences with preterm infants in the neonatal intensive care unit (NICU) and to determine the frameworks used.

METHODS

A systematic review of the literature using the PRISMA guideline was performed. An electronic database search of published literature between 2000 and 2022 was conducted based on predetermined search terms and parameters.

RESULTS

Twenty-seven articles met the inclusion and exclusion criteria. Eleven articles focused on feeding practices, ten reported on nursing/maternal care experiences, five reported mental health/social support, and only one focused on mother-infant relationships. Only five papers reported using any frameworks, comprising grounded theory framework (n = 2), theory of planned behavior (n = 1), research justice framework (n = 1), and the patient and public engagement protocol (n = 1).

DISCUSSION

A holistic approach to understanding the multifactorial experiences of Black mothers with preterm infants needs to be socio-culturally competent to ensure their diverse intersections and identities are accurately represented and understood. Rigorous research at the intersection of Black maternal health and the NICU hold promises for advancing maternal health equity in the United States.

Dysphoric Milk Ejection Reflex: Report of Two Cases and Postulated Mechanisms and Treatment

Background: The symptoms of Dysphoric Milk Ejection Reflex (D-MER) occur just before milk release, last no more than a few minutes, and then subside spontaneously, which are characterized by a sudden and transient feeling of dysphoria, depression, sadness, or other negative emotions. These emotions may adversely affect the mother's lactation behavior and mental health, negatively influence the mother-child relationship, and even result in self-harm or suicidal tendencies in lactating women. Case Presentation: We reported two cases of breastfeeding mothers with D-MER who experienced unpleasant emotions during lactation. Severely affected by D-MER symptoms, the mother in the first case chose to wean prematurely after struggling for 6 months, and her symptoms disappeared after weaning. With the help of professional guidance, the mother with D-MER in the second case actively adjusted and persisted in breastfeeding until her daughter was 18 months old, after that her symptoms vanished. Discussion: Awareness and knowledge of D-MER are insufficient among the public and health care professionals. D-MER is not a psychological disorder but a physiological issue caused by hormones, which is different from postpartum depression. The severity of D-MER symptoms can be evaluated by the assessment tool of the D-MER spectrum. Lactating women can relieve their symptoms through self-regulation, lifestyle changes, and professional guidance and treatments. Conclusions: The two cases studies about Chinese women with D-MER will enrich the knowledge of D-MER, and it might suggest some directions to health care workers for exploring scientific guidance and treatments for lactating women. Because the literature and published empirical studies about D-MER are scarce, further researches on the theory and interventions of D-MER are necessary.

Factors Associated with an Inadequate Volume of Expressed Milk Among Mothers of Preterm and Low Birth Weight Neonates Admitted to Neonatal Intensive Care Units of Government Hospitals in Addis Ababa, Ethiopia

Background

Around 15 million live newborns are born prematurely each year around the world before 37 weeks. One cause of inadequate nursing is prematurity. The goal of this study was to find parameters linked to an insufficient volume of expressed milk among mothers of preterm and low birth weight neonates at government hospitals in Addis Ababa, Ethiopia.

Methods

An nstitution-based cross-sectional study was conducted on a total of 124 mothers who were available in neonatal intensive care units during the study period in government hospitals that provided such units.

Results

One-third of the responders (33.9%) were unable to express the necessary amount of milk. An inadequate volume of expressed breast milk was significantly associated with a baby's stable health status (AOR=0.24; CI=0.07-0.86), the fair (subcritical) health status of the baby (AOR=0.178; CI=0.04-0.76), worry about the volume of milk (AOR=7.50; CI=3.32-16.95), and worry about the baby's health status (AOR=4.63; CI=2.21-9.70).

Conclusion

According to our findings, 33.9% of mothers were unable to express sufficient amounts of milk. To produce an adequate volume of expressed breast milk, health care workers must address mothers' psychological issues in the neonatal intensive care units and give all necessary care to prevent neonatal deterioration.

Indicators of Secretory Activation in Mothers of Preterm Very Low Birth Weight Infants

BACKGROUND

Inconsistent information exists regarding indicators of secretory activation in mothers delivering very low birth weight infants.

RESEARCH AIMS

To compare time to the onset of secretory activation using three separate indicators. A secondary aim examined the association between indicators of secretory activation and milk production.

METHODS

Indicators of secretory activation included maternal perception, volume attainment (production of ≥ 20 mL in two consecutive expression sessions) and biomarkers (sodium and lactose) obtained at volume attainment. Milk production was measured on Days 1-7 and then weekly for 6 weeks.

RESULTS

In 69 mothers of infants born ≤ 32 weeks' gestation and < 1500 g, we found no correlation in time to secretory activation between indicators. Earlier volume attainment was associated with increased milk production on Days 1-7, 14, 21, and 28 (all p < .007). Participants who exhibited both normal lactose and sodium levels produced more milk on Days 28 and 42 (p = .028 and .011), those with only normal lactose levels produced more on Day 42 (p = .026) and those with only normal sodium levels on Day 28 (p = .036). Earlier secretory activation by volume attainment was associated with increased expression frequency during Days 2-5 (all p < .014) and participants with normal biomarkers expressed more frequently during Days 2-5 (all p < .020).

CONCLUSION

Mothers of very low birth weight infants are at risk for delayed secretory activation, which may decrease their milk production. Frequent expression during the first 5 days postpartum may promote earlier secretory activation. Valid methods of determining secretory activation are necessary to develop interventions promoting earlier secretory activation.

Measures of Lactation Outcomes in Women Delivering Preterm Infants

BACKGROUND

Mother's own milk (MOM) is well known to decrease prematurity-related morbidities, yet mothers delivering preterm infants often produce insufficient quantities of milk to provide these benefits. Although a critical need exists for research to support lactation success in this vulnerable population, development and investigation of interventions to increase available MOM for infant consumption requires consistent, valid, and reliable measures of lactation outcomes.

OBJECTIVES

The aim of this study was to compare and contrast methods of measuring lactation outcomes in mothers of preterm infants and evaluate their advantages and disadvantages.

METHODS

Measures of lactation outcomes were reviewed and synthesized. Insights on best practices and future research directions are provided.

RESULTS

Volume of MOM produced, lactation duration, and time to onset of secretory activation are important measures of lactation success. The most valid and reliable measure of milk production is likely weighing each vial of expressed milk combined with test weighing when infants breastfeed. Measures of lactation duration should include actual days mothers lactated rather than limiting to infant consumption of MOM as a proxy for duration and include not only whether mothers are lactating at infant discharge but whether they are also lactating at other health-relevant time points during hospitalization. Although time to onset of secretory activation is an important lactation outcome, information regarding valid and reliable indicators of onset in women delivering preterm infants is limited, and investigation of such indicators is a research priority. Variables that may affect lactation outcomes, including time to initiation of expression following delivery, duration of expression sessions, expression method, time spent in skin-to-skin care, maternal demographics and comorbidities, as well as maternal intent to lactate, must be considered when researchers investigate lactation outcomes in mothers of very low birth weight infants.

DISCUSSION

Consistent and valid measures of lactation outcomes are required to produce reliable results from which evidence-based practice recommendations can be developed in order to improve lactation success in this vulnerable population.

Timing of milk expression following delivery in mothers delivering preterm very low birth weight infants: a randomized trial

OBJECTIVE

To determine the effect of timing of expression initiation on mother's own milk production and time to secretory activation in mothers of preterm infants.

STUDY DESIGN

180 mothers delivering infants ≤1500 grams and ≤32 weeks gestation were randomized to begin expression within 60 (early), 61-180 (intermediate) or 181-360 (late) minutes following delivery. Milk volume was measured on days 1-7 and weekly for 6 weeks. Time to secretory activation was determined through self-report.

RESULTS

The late group produced more milk than the early group in the first 3 days (p = 0.015-0.031) and over 6 weeks (p = 0.045). The late group had more expressions on day 1 (early: p = 0.049; intermediate; p = 0.048).

CONCLUSION

Initiation of expression at 181-360 min following delivery was associated with increased milk production for 6 weeks following delivery. Further research is needed to determine the effect of expression frequency on milk production in the first days following birth.

Supports and Barriers to the Provision of Human Milk by Mothers of African American Preterm Infants

BACKGROUND

Mother's own milk (MOM) provides significant health benefits to very low birth-weight infants (VLBW, ≤1500 g). However, 60% of African American (AA) women initiate lactation, and less than 35% provide MOM 6 months following the birth of their infant. Previous research focuses on term infants and is not specific to AA mothers of VLBW infants.

PURPOSE

To qualitatively describe supports and barriers experienced by AA mothers while providing MOM for their VLBW infants.

METHODS

In this qualitative, descriptive study, we conducted semistructured interviews with AA mothers who provided MOM for their VLBW infant. Interviews were transcribed and manually coded concurrently with enrollment until theoretical saturation was achieved. Infant charts were reviewed for demographics, and triangulation with notes from the medical record by bedside nurse lactation consultants and other providers was performed to increase validity. Member checks were completed to ensure true meaning of responses.

RESULTS

Theoretical saturation was achieved after 9 interviews. Themes perceived to support provision of MOM included (1) Being a Mother; (2) Neonatal intensive care unit environment; (3) Community support; and (4) Useful resources. Themes that emerged as barriers to the provision of MOM were: (1) Maternal illness; (2) Milk expression; (3) Challenging home environment; and (4) Emotional distress.

IMPLICATIONS FOR PRACTICE

African American mothers report supports similar to published data but faced challenges not previously reported. These factors warrant attention by professionals who support lactation in this population.

IMPLICATIONS FOR RESEARCH

Future research will address perceived barriers to improve provision of MOM and the quality of the lactation journey of AA mothers of preterm infants.

Expressing Human Milk in the NICU: Coping Mechanisms and Challenges Shape the Complex Experience of Closeness and Separation

BACKGROUND

Human milk has multiple benefits for human health; however, rates of infants receiving human milk at discharge in Canadian neonatal intensive care units (NICUs) are far below recommendations of the Baby Friendly Hospital Initiative supported by the Canadian Pediatric Association. Mothers of infants requiring NICU care usually need to express their milk, especially mothers of premature infants, since for some time their infant is unable to feed directly at the breast. Expressing human milk for an extended period can be challenging for mothers.

PURPOSE

To document maternal experiences expressing human milk for their infant in the NICU as a closeness or separation experience, and to discover what factors gave rise to these perceptions.

METHODS

In this descriptive qualitative cross-sectional study, 15 mothers whose infants were hospitalized in a level III NICU and who were expressing human milk audio recorded their thoughts and feelings with a smartphone application for 48 hours while they were expressing milk. A thematic content analysis was used to analyze data.

FINDINGS

Expressing human milk for their hospitalized infant was a difficult experience for all mothers, and most described both closeness and separation feelings while expressing milk. Their feelings fluctuated depending on their coping mechanisms, perceived challenges, as well as their location and environment. Mothers were all pursuing their goal of continued milk expression with various levels of motivation.

IMPLICATIONS FOR PRACTICE

NICUs should adopt a family-centered approach to care whereby mothers' care needs related to milk expression are addressed. Nurses can ask open-ended questions to explore how mothers are coping, and they can assist mothers to find effective coping strategies to minimize the challenges related to milk expression to promote mother-infant closeness.

IMPLICATIONS FOR RESEARCH

The impact of environment and location on mothers with hospitalized infants should be explored, as unit designs could be altered to foster closeness.

Barriers to Human Milk Feeding at Discharge of Very-Low-Birth-Weight Infants: Maternal Goal Setting as a Key Social Factor

BACKGROUND

While black mothers initiate human milk (HM) provision at lower rates than non-black mothers in the United States, some neonatal intensive care units (NICUs) report similar initiation rates regardless of race/ethnicity for mothers of very-low-birth-weight (VLBW) infants. However, racial disparity frequently becomes evident in the proportion of black infants who continue to receive HM feedings at NICU discharge. Since social factors have been associated with differences in HM provision for term infants, we sought to identify differences in social factors associated with HM feeding at discharge based on race/ethnicity.

MATERIALS AND METHODS

A prospective cohort study of racially diverse mothers of VLBW infants measured social factors including maternal education, breastfeeding support, return to work/school, HM feeding goal, previous breastfeeding, or formula experience. Multivariate logistic regression modeling was applied to social factors to predict HM feeding at discharge. Additional regression models were created for racial/ethnic subgroups to identify differences.

RESULTS

For all 362 mothers, WIC (Special Supplemental Nutrition Program for Women, Infants, and Children) eligibility and maternal goal near time of discharge of providing any HM negatively and positively predicted HM feeding at discharge, respectively. Perceived breastfeeding support from the infant's maternal grandmother negatively predicted HM feeding at discharge for black mothers.

CONCLUSIONS

Future interventions to increase duration of HM provision in VLBW infants should focus on the establishment and maintenance of maternal HM feeding goals. Further studies of the familial support system of black mothers are warranted to determine multigenerational impact and potential interventions.