Milk Volume at 2 Weeks Predicts Mother's Own Milk Feeding at Neonatal Intensive Care Unit Discharge for Very Low Birthweight Infants

Maternal and Infant Characteristics and Pumping Profiles of Women That Predominantly Pump Milk for Their Infants

BACKGROUND

Whilst it is inconvenient and time-intensive, predominantly (PP) and exclusively pumping (EP) mothers rely on breast expression to provide milk for their infants and to ensure continued milk supply, yet these populations are poorly understood.

METHODS

We assessed and characterised Western Australian PP mothers (n = 93) regarding 24 h milk production (MP) and infant milk intake and demographics, perinatal complications and breastfeeding difficulties, the frequencies of which were compared with published general population frequencies. Pumping efficacy and milk flow parameters during a pumping session in PP mothers (n = 32) were compared with those that pump occasionally (reference group, n = 60).

RESULTS

PP mothers had a higher frequency of pregnancy complications and breastfeeding difficulties than the general population. Exclusive pumping did not impact the 24 h MP and the amount of milk available to the infant. PP mothers had more milk ejections, longer active flow duration and lower milk removal efficacy ratios; however, responsiveness to pump (time to first milk ejection), total flow duration, time to stop pumping, percentage of available milk removed and comfort parameters were not different to the reference group.

CONCLUSIONS

Despite the reported challenges, when an effective pump is used, predominant or exclusive pumping does not negatively affect the 24 h MP and the amount of milk available to the infant. Increasing awareness of the impacts of perinatal and breastfeeding complications on women may assist health professionals in early identification of mothers at high risk for early cessation of breastfeeding, escalating early postpartum intervention and targeted breastfeeding support.

Effect of early establishment of full enteral feeding with exclusive mother's own milk in preterm babies: a retrospective cohort study

BACKGROUND

Human milk, especially the mother's own milk (MOM), is highly recommended for preterm babies considering its numerous benefits. Prioritising the use of exclusive MOM in enteral feeding plans is essential for maximising the health and development of preterm babies. This study evaluated the effect of early establishment of full enteral feed (FEF) with exclusive MOM on feeding rate and neonatal nutritional outcomes at discharge among preterm babies.

METHODS

A retrospective cohort study was conducted using medical records of single preterm babies born between 27 and 33+6 weeks of gestational age and admitted to a single tertiary care hospital in South India between June 2019 and May 2022. The primary exposure was the establishment of FEF with exclusive MOM. The outcomes assessed were the exclusive MOM feeding rate and neonatal nutritional outcomes at discharge.

RESULTS

A total of 160 preterm babies met the inclusion criteria. Among these 104 (65%) achieved FEF with exclusive MOM. The exclusive MOM feeding rate at discharge was significantly higher among preterm babies who achieved FEF with exclusive MOM, 91.3% vs 62.5% (RR: 1.46 (95% CI: 1.18 to 1.81)). Preterm babies who achieved FEF with exclusive MOM were five times more likely to continue exclusive MOM feeding at discharge (aOR: 5.37, 95% CI: 2.04 to 14.16). The median time taken to achieve exclusive MOM among the exposure group was 6 days (95% CI: 5.6 to 6.3) compared with 12 days (95% CI: 10.2 to 13.8) for the unexposed group (HR: 0.26 (95% CI: 0.17 to 0.38; p<0.001)). There was no significant difference in growth and neonatal complications between the groups. Availability of MOM within 48 hours was strongly associated with achieving FEF with exclusive MOM, with an adjusted OR of 6.12 (95% CI: 2.81 to 13.30).

CONCLUSIONS

Early establishment of FEF with exclusive MOM increases the exclusive MOM feeding rate at discharge. Early access to MOM within 48 hours significantly enhances the likelihood of achieving FEF with exclusive MOM.

The relationship of early expressed milk quantity and later full breastmilk feeding after very preterm birth: A cohort study

When infants cannot directly breastfeed after birth, mothers are advised to initiate lactation through mechanical expression. Families are recommended to target an expression volume of at least 500-750 mL by Day 14 after birth, as this is considered a 'critical window' to establish milk supply. This is challenging for many mothers after a very preterm birth. This article explores the relationship of early milk quantity and later full breastmilk feeding as a 'gold standard' outcome, using statistical techniques designed for diagnostic tests. A cohort of 132 mothers of infants born at 23 + 0 to 31 + 6 weeks' gestational age submitted expressing logs on Day 4, 14 and 21 after birth and provided later feeding outcome. Using receiver operating characteristic (ROC) analysis, the following 24-h milk quantities were identified as associated with high probability of full breastmilk at 36 weeks' post-menstrual age (PMA): on Day 4, ≥250 g (specificity 88%; positive predictive value 88%) and on Day 21 ≥650 g (specificity 88%; positive predictive value 91%). The following values were identified as associated with low probability of full breastmilk at 36 weeks' PMA: on Day 4 <50 g (sensitivity 92%; negative predictive value 72%) and on Day 21 <250 g (sensitivity 90%; negative predictive value 70%). Participants exceeding the high thresholds had 3-4 times increased likelihood of full breastmilk, whereas those below the low thresholds had 3-5 times lower likelihood. These thresholds have potential as targets for families, to provide individualised prognostic information and to help clinicians target more intensive lactation support.

Multivariate Analysis of Factors Associated with Feeding Mother's Own Milk at Discharge in Preterm Infants: A Retrospective Cohort Study

OBJECTIVE

 This study aimed to develop a predictive model of feeding mother's own milk (MOM) at discharge using social determinants of health (SDOH), maternal and neonatal factors after deliveries at <33 weeks of gestational age (GA), or birth weight <1,500 g.

STUDY DESIGN

 Secondary analysis of a retrospective cohort in an inner-city hospital before (Epoch-1, 2018-2019) and after (Epoch-2, 2020-2021) implementing a donor human milk (DHM) program.

RESULTS

 Among 986 neonates, 495 were born in Epoch-1 (320 Hispanic White, 142 Non-Hispanic Black, and 33 Other) and 491 in Epoch-2 (327, 137, and 27, respectively). Feeding any MOM was less frequent in infants of non-Hispanic Black mothers than in those of Hispanic mothers (p < 0.05) but did not change with epoch (p = 0.46). Among infants who received any MOM, continued feeding MOM to the time of discharge was less frequent in infants of non-Hispanic Black mothers versus those of Hispanic mothers, 94/237 (40%) versus 339/595 (57%; p < 0.05), respectively. In multivariate analysis including SDOH and maternal variables, the odds of feeding MOM at discharge were lower with SDOH including neighborhoods with higher poverty levels, multiparity, substance use disorder, non-Hispanic Black versus Hispanic and young maternal age and increased with GA but did not change after implementing DHM. The predictive model including SDOH, maternal and early neonatal variables had good discrimination (area under the curve 0.85) and calibration and was internally validated. It showed the odds of feeding MOM at discharge were lower in infants of non-Hispanic Black mothers and with feeding DHM, higher need for respiratory support and later initiation of feeding MOM.

CONCLUSION

 Feeding MOM at discharge was associated with SDOH, and maternal and neonatal factors but did not change after implementing DHM. Disparity in feeding MOM at discharge was explained by less frequent initiation and shorter duration of feeding MOM but not by later initiation of feeding MOM.

KEY POINTS

· In this cohort study of preterm infants, factors of feeding MOM at discharge included (1) SDOH; (2) postnatal age at initiation of feeding MOM; and (3) maternal and neonatal factors.. · Feeding MOM at the time of discharge was less frequent in infants of non-Hispanic Black mothers versus those of Hispanic mothers.. · Disparity in feeding MOM at discharge was explained by less frequent initiation and shorter duration of MOM feeding but not by later postnatal age at initiation of feeding MOM..

A Longitudinal Observation of Antenatal Milk Expression in Mothers of Infants with Congenital Anomalies

Background: For mothers of infants with congenital anomalies, antenatal milk expression (AME), known as hand expression during late pregnancy, allows mothers to contribute to their newborn's care through colostrum collection. However, research is limited by self-report of AME adherence and colostrum volume. Objective: This study examined the ability of participants to adhere to a recommended protocol on AME for any removal and measurement of colostrum during late pregnancy. Materials and Methods: A prospective, longitudinal, observational design was used. Our recommended protocol involved hand expression of 5 minutes per breast for a total of 10 minutes for each AME session twice per 24 hours for any colostrum from 37 0/7 weeks gestation until birth. Women received AME education, completed milk logs, and attempted AME. The study team verified all colostrum volumes. Results: Nineteen women (10 nulliparous) participated, with 13 (68%) carrying infants with major organ system defects and 6 (32%) carrying infants with congenital heart defects. Most participants (52.6%) completed more than half but fewer than all AME sessions. Seven participants (36.8%) fully adhered, completing two AME sessions daily until hospital admission. Eighteen participants (94.7%) could remove milk (80-100% of the time). The 24-hour colostrum volume (median 0.35 mL, interquartile range [IQR] 0.065-0.845) and the total colostrum volume (median 3.99 mL, IQR 1.35-6.82) from AME varied. Conclusions: Among a small group of women of infants with congenital anomalies, adherence to a recommended protocol is feasible but varied by AME session frequency. Most women could collect colostrum for future infant feeding.

Shifting the Paradigm for Establishing and Maintaining Milk Production in the Setting of Mother/Infant Separation

Establishing lactation when mother and infant are separated, such as when the neonate is admitted to the neonatal intensive care unit (NICU), is challenging. The most common clinical advice is to express milk eight or more times per day, every 3 hours, around the clock. Sometimes, the first time that parents hear this is after the birth of their baby. This can be overwhelming and sometimes unachievable. A five-step paradigm shift is proposed that refocuses lactation care on providing evidence-based assistance and ongoing clinical education, and assessment beginning prenatally and extending past maternal discharge, to improve outcomes through curated support. Simple guidelines can begin with expressing milk at least five times a day by Day 5 of life (5 × 5), and expressing milk at least once between 0100 and 0500 (overnight pumping). With these measures, neonatal care in the NICU setting can provide personalized and achievable guidance on pumping schedules.

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.

Early postpartum pumping behaviors, pumped milk volume, and achievement of secretory activation in breast pump-dependent mothers of preterm infants

OBJECTIVE

Pumping studies in mothers of preterm infants are limited by self-reported pumping behaviors and non-objective measures of pumped milk volume and secretory activation (SA).

METHODS

Non-randomized observational study of first 14 days postpartum in 29 mothers of preterm infants. Smart pumps measured and stored pumping behaviors and pumped milk volume. Selective ion electrodes measured sodium and sodium:potassium ratio to determine SA. Generalized estimating equations, cluster analyses and multivariate regression were used.

RESULTS

SA was delayed (median 5.8 days) and impermanent. Each additional daily pumping increased odds of SA within 2 days by 48% (p = 0.01). High-intensity pumping mothers (N = 17) had greater daily and cumulative pumped milk volume than low-intensity pumping mothers (N = 12). Pumping variables showed daily changes in the first week, then plateaued.

CONCLUSION

The first week postpartum is critical for optimizing pumping behaviors. Accurate, objective measures of pumping behaviors, pumped milk volume and SA are a research priority.

Lactation-focused audio relaxation versus standard care for mothers of very preterm infants (the EXPRESS randomised clinical trial)

BACKGROUND

Mothers of very premature newborns often have low milk supply. Systematic review has shown increased milk quantity with relaxation interventions. We hypothesised that a self-directed audio relaxation and lactation-specific visualisation would increase milk quantity after a very premature birth.

METHODS

Unmasked, randomised, controlled trial, recruiting 132 participants in four United Kingdom neonatal units. Eligible women had given birth to one or two infants between 23+0 and 31+6 weeks of gestation. The intervention was a 12-min voice recording including breathing exercises, muscle relaxation and lactation-specific visualisation. Primary outcome was the highest 24-h breastmilk weight expressed on any of day 4, day 14 or day 21 after birth.

RESULTS

Mean birth gestation was 27.8 weeks (SD 2.4), with 26% of participants giving birth under 26 weeks (34/132). Adjusted mean difference in primary outcome was 73.9 g (95% CI -61.7 to 209.5, p = 0.28). Spielberger State-Trait Anxiety Index adjusted mean difference was -1.9 (-8.2 to 4.3, p = 0.54). The majority of relaxation group participants felt the intervention was relaxing (32/42, 76%).

CONCLUSIONS

There was no beneficial effect of this relaxation intervention on milk quantity. Mothers of very premature infants may value relaxation interventions but they are unlikely to have a large effect on milk quantity.

IMPACT

This randomised trial did not show a beneficial effect of a self-directed audio relaxation and visualisation on mothers' own milk quantity expressed after very preterm birth. Mothers of very and extremely preterm infants may value relaxation interventions, but they are unlikely to have a large effect on milk quantity. Prior systematic review of mixed populations has shown an increase in mothers' own milk quantity with relaxation interventions. Combining this study with existing meta-analysis could result in a new hypothesis that the lower the gestation at birth, the smaller the impact of relaxation on milk quantity.

Biomarker-based text messages to promote lactation success in mothers of critically Ill infants: a randomized controlled pilot study

OBJECTIVE

Infrequent breast pumping limits mother's own milk production in mothers of infants admitted to the neonatal intensive care unit. We aimed to determine the feasibility and benefit of biomarker-based personalized text messages on pumping frequency and milk sodium levels. A secondary aim examined lactation outcomes.

STUDY DESIGN

In this randomized controlled pilot study, 51 mothers were randomized to receive personalized text messages regarding pumping frequency or standard care.

RESULTS

There were no differences in pumped milk volume or sodium level, however, there was a trend towards the intervention group pumping more frequently, which was significant on day 5 (p = 0.035), and they lactated nearly 9 days longer. Post-hoc analysis found the intervention group tended to be more likely to pump ≥ 500 mL by day14 (p = 0.08), a marker of long-term lactation success.

CONCLUSION

Personalized biomarker-based text messages are feasible and may support lactation in mothers of critically ill infants.

Comparison of Two Pumping Strategies to Improve Exclusive Breastfeeding at Discharge in Mothers of VLBW Infants with Low Milk Output - A Pilot Randomized Controlled Trial

OBJECTIVES

To compare the effect of two strategies of breast pumping -power pumping (PP) vs. routine pumping (RP) over one week in mothers of very low birth weight (VLBW) infants with low milk output to improve breastfeeding rates at discharge.

METHODS

Mothers with low milk output, defined as inability to express sufficient breastmilk to meet the feeding requirements of their infant on or after post-natal day 14, were randomized to receive power pumping vs. routine pumping - once daily for 7 d coupled with routine lactation support and hand expression 3 hourly in both groups. The primary outcome was exclusive breastfeeding at discharge.

RESULTS

There was no difference in the two pumping strategies with respect to exclusive breastfeeding rates [61.1% in PP vs. 50% in RP group; (p = 0.477, RR 1.2; 95% CI 0.76 to 2.17)]. Median milk volume pumped in the individual power pumping session on 7th day of intervention was significantly higher than that in the individual routine pumping session on the 7th day (50 mL vs. 27 mL, p = 0.014). The cumulative median milk volume expressed per individual pumping session over the 7 sessions of power pumping was also higher than that with routine pumping (305 mL vs. 213 mL, p = 0.054).

CONCLUSIONS

In this pilot trial, expressed milk volume was significantly higher after each individual power pumping session compared to routine pumping. However, the exclusive breastfeeding rates at discharge were similar in the two groups.

Achieving sufficient milk supply supports mothers to cope with premature birth

AIM

To explore whether and how expressing breast milk is perceived as helpful in coping with negative emotions due to premature birth by mothers of very low birth weight (VLBW) infants.

METHODS

Qualitative interviews and a retrospective cross-sectional questionnaire with mothers of VLBW infants were conducted and analysed using an exploratory sequential mixed-method design. Hypotheses were built using qualitative content analysis and quantitatively tested using multivariate regression analysis.

RESULTS

Interviews with 12 mothers and questionnaires of 518 mothers were analysed. Coping with prematurity by expressing milk was seen as a way to maintain the caregiving role for the mothers, where three relevant factors arouse: making up for what happened, providing the best for their infant and fear of low milk supply. Quantitative analysis showed that mothers with a high milk supply (Coef. = 1.1, p < 0.000) and more feelings of guilt due to premature birth (Coef. = -0.1; p = 0.015) perceived expressing breast milk significantly more as a resource for coping.

CONCLUSION

This study adds knowledge on how expressing breast milk for their VLBW infant may support mothers in coping with premature birth, by revealing the association with milk supply and feelings of guilt due to premature birth.

Having Enough Milk to Sustain a Lactation Journey: A Call to Action

The rates of human milk feeding are suboptimal worldwide. Recommendations for healthy, term mother-infant dyads include early breastfeeding initiation, frequent skin-to-skin contact, and frequent breastfeeding. The normal physiology of lactation can be affected by prenatal factors such as diabetes, obesity, and excessive gestational weight gain. Furthermore, birth-related factors such as early-term gestation, stressful labor, unscheduled cesarean birth, and postpartum hemorrhage can additionally disrupt recommended practices such as early initiation of breastfeeding and skin-to-skin contact. Given that the first 2 to 3 days postpartum are critical to achieving timely secretory activation and establishing an adequate volume of milk, a proactive approach to care can include building awareness of risk factors and development of protocols for the effective early initiation of lactation.

The relationship of milk expression pattern and lactation outcomes after very premature birth: A cohort study

INTRODUCTION

Mothers of very premature infants often have difficulties expressing breastmilk, which can cause distress and potential negative impact on infant health. Clinical recommendations on breastmilk expression are extrapolated from term infants' breastfeeding patterns. This study's objective was to analyse the association of expressing pattern with lactation outcomes after very premature birth.

METHODS

132 participants were recruited after birth between 23+0 and 31+6 weeks' gestation. Participants recorded the milk expressed in several 24-hour periods in the three weeks after birth.

RESULTS

Expressing frequency was positively associated with 24-hour milk yield, with an adjusted 30.5g increase per expressing session on day four (95% CI 15.7 to 45.3) and 94.4g on day 21 (95% CI 62.7 to 126.2). Expressing ≥8 times per day was associated with higher adjusted milk yield than expressing <6 times (on day four, 146.8g, 95% CI 47.4 to 246.1), but not in comparison to expressing 6-7 times (on day four, 82.1g, 95% CI -25.9 to 190.1). Participants with six months or more prior breastmilk feeding experience had a higher adjusted milk yield than others (on day four, 204.3g, 95% CI 125.2 to 283.3). Night-time (2300-0700 hours) expressing sessions were not associated with increased milk yield after adjustment for time since the prior session. On average, participants who had a longest gap between expressions of less than six hours achieved the UK target of 750g breastmilk, whereas those with a longer gap did not.

CONCLUSION

Expressing frequency was an important determinant of milk yield. Clinical recommendations to express ≥8 times per day were supported but for some, 6-7 times was sufficient. This was particularly likely for those with six months or more of prior breastmilk feeding experience. A need to express during the night-time hours appeared to be related to minimising the gap between expressions rather than an inherent value of night-time expression.

Factors Associated with Low Volumes of Mother's Own Milk at Neonatal Intensive Care Unit Discharge of Very Low Birth Weight Infants-a Cohort Study

Background: Mother's own milk (MOM) provides health benefits for infants with very low birth weight (VLBW). This study aimed to describe the incidence and factors associated with low volumes of MOM (<50% of total diet volume) at discharge for VLBW infants. Methods: A prospective cohort study of infants with VLBW and gestational age of <30 weeks, who survived to discharge and had no contraindication to MOM. We conducted bivariate analyses to investigate associations with the volume of MOM at discharge, using chi-square, t, and Mann-Whitney tests. All p-value analyses were two-tailed. The variables significantly associated with "low volumes of MOM" entered the multivariable analysis. Univariate and multivariate relative risk (confidence interval [CI] 95%) estimates were obtained from Poisson regression with a robust estimate of variance and controlled by the length of hospital stay. Results: Of 414 infants included and followed until discharge, 32.9% (n = 136) received less than 50% of the total daily volume of MOM. This outcome was associated with gestational age <28 weeks, lower birth weight, multiple births, developing bronchopulmonary dysplasia, and longer lengths of stay. After Poisson regression, low volumes of MOM at discharge were associated only with being born multiples (RR 2.01; CI 95% 1.53-2.64, p < 0.001) and with longer length of stay (RR 1.07; CI 95% 1.01-1.14, p = 0.01). Conclusions: Most VLBW infants were discharged home receiving predominantly MOM. Each neonatal intensive care unit (NICU) should acknowledge which clinical characteristics of mothers and VLBW infants are associated with difficulties maintaining MOM volumes until discharge.

Multi-prong quality improvement approach for increasing mother's own milk use for very low birth weight infants

OBJECTIVE

Evaluate a single center quality improvement (QI) collaborative designed to increase the provision of mother's own milk (MOM) at discharge to premature infants through evidence-based practices while targeting perinatal health disparities.

DESIGN

This QI initiative was designed for preterm infants admitted to a single-center NICU within 24 h of life. Interventions were implemented between March 2022 and June 2022. MOM provision rates were compared between baseline (August 2021-February 2022), and after interventions (March 2022-December 2022).

RESULTS

The percentage of mothers who discontinued pumping during the infant hospitalization decreased from 49% to 35% (p < 0.01). Infant discharge diet with MOM improved from 36% to 58% (p < 0.001). Pump frequency at two weeks increased from 4.0 ± 2.6 to 5.1 ± 2.4 (p = 0.026).

CONCLUSION

Our collaborative increased the percentage of preterm infants receiving MOM at discharge and reduced the number of mothers who discontinue pumping during the NICU hospitalization.

Lactation support in neonatal intensive care units in Germany from the mothers' perspective - a mixed-method study of the current status and needs

BACKGROUND

Establishing successful lactation in mothers of very low birth weight (VLBW, <1500g) infants requires structured lactation support. Little is known about mothers' perspectives on lactation support in German neonatal intensive care units (NICUs).

METHODS

This paper features a convergent mixed-method approach that includes a retrospective, cross-sectional questionnaire and interview data to showcase mothers' perceptions of lactation support in NICUs. Content analysis of the interviews (n = 12) and a descriptive analysis of quantitative data (n = 533) were performed to illustrate the current status and need for lactation support in German NICUs.

RESULTS

The results show that lactation support in German NICUs is often inadequate and does not comply with recommendations based on the existing literature to encourage pumping and breastfeeding in mothers. The data imply that even if lactation is successfully initiated in most cases, it is often not maintained over time, which may be due to a lack of personal support and consistent information.

CONCLUSION

The overall structures and institutional guidelines for lactation support should be encouraged to promote nutrition with mother´s own milk in German NICUs.

Pressure to provide milk among mothers of very low birth weight infants: an explorative study

BACKGROUND

Pump-dependent mothers of very low birth weight (VLBW, < 1500g) infants experience specific challenges achieving sufficient milk supply in the neonatal intensive care unit (NICU) and are therefore less frequently able to achieve (exclusive) breast milk feeding. Stress due to the limitations on participating in the infant's care may contribute to this problem. Some explorative studies suggest that pressure to provide milk may be an additional stressor in mothers. However, the type of pressure to provide milk perceived by mothers of VLBW infants has rarely been examined.

METHODS

A retrospective and anonymous questionnaire was conducted with mothers of VLBW infants aged 6 to 24 months at the time of data collection. Quantitative data and written comments were used to examine the mothers' perceptions. Descriptive and bivariate tests (Spearman´s rho, Pearson's chi2) were performed to show correlations between pressure to provide breast milk, parental stress (PSS:NICU: role alteration subscale), milk volume, and maternal factors. Pressure to provide milk was measured through two self-developed single items to differentiate between internal and external pressures.

RESULTS

Data of n = 533 mothers of VLBW infants was analysed. More than 70% of the mothers agreed that they pressured themselves to provide milk for their infant. In contrast, 34% of the mothers agreed that they felt pressure from outside to provide milk. Higher milk volume 14 days post-partum was significantly correlated with higher internal (Spearman´s rho = 0.2017, p = 0.000) and higher external pressure to provide milk (Spearman´s rho = 0.2991; p = 0.000). Higher PSS:NICU parental role alteration scores were significantly correlated with more internal (Spearman´s rho = -0.2865, p = 0.000) and more external pressure to provide milk (Spearman´s rho = -0.1478; p = 0.002). Milk volume 14 days post-partum and the PSS:NICU were not significantly correlated (Spearman´s rho = -0.0190; p = 0.701). Qualitative analyses highlighted these results and enhanced the bidirectional relationships between maternal pressure to provide milk and milk volume.

CONCLUSIONS

Especially internal pressure to provide milk is perceived by many mothers, being mutually dependent on milk supply and parental stress. Pressure to provide milk may be an important factor to decrease maternal stress in the NICU and, therefore, lead to more positive pumping and breastfeeding experiences. More research and validated instruments are needed to adequately measure pressure to provide milk with its different psychological, social, and environmental dimensions.

Where does the time go? Temporal patterns of pumping behaviors in mothers of very preterm infants vary by sociodemographic and clinical factors

Background

Mothers of very preterm (<32 weeks gestational age [GA]) infants are breast pump dependent and have shorter duration of milk provision than mothers of term infants. The opportunity (i.e., time) cost of pumping and transporting mother's own milk (MOM) from home to the NICU may be a barrier. There is a paucity of data regarding how much time mothers actually spend pumping.

Objective

To investigate the variation in pumping behavior by postpartum week, maternal characteristics, and infant GA.

Methods

Prospectively collected pump log data from mothers enrolled in ReDiMOM (Reducing Disparity in Mother's Own Milk) randomized, controlled trial included pumping date and start time and end time of each pumping session for the first 10 weeks postpartum or until the infant was discharged from the NICU, whichever occurred first. Outcomes included number of daily pumping sessions, number of minutes spent pumping per day, and pumping behaviors during 24-h periods, aggregated to the postpartum week. Medians (interquartile ranges) were used to describe outcomes overall, and by maternal characteristics and infant GA.

Results

Data included 13,994 pump sessions from 75 mothers. Maternal characteristics included 55% Black, 35% Hispanic, and 11% White and 44% <30 years old. The majority (56%) of infants were born at GA 28-31 weeks. Mothers pumped an average of less than 4 times per day, peaking in postpartum week 2. After accounting for mothers who stopped pumping, there was a gradual decrease in daily pumping minutes between postpartum weeks 2 (89 min) and 10 (46 min). Black mothers pumped fewer times daily than non-Black mothers after the first 2 weeks postpartum.

Conclusion

On average mothers pumped less intensively than the minimum recommendation of 8 times and 100 min per day. However, these pumping behaviors represent significant maternal opportunity costs that should be valued by the institution and society at large.

Milk Biomarkers of Secretory Activation in Breast Pump-Dependent Mothers of Preterm Infants: An Integrative Review

Background: Lack of mother's own milk (MOM) at discharge from the neonatal intensive care unit (NICU) is a global problem and is often attributable to inadequate MOM volume. Evidence suggests that the origins of this problem are during the first 14 days postpartum, a time period that includes secretory activation (SA; lactogenesis II, milk coming in). Objectives: To describe and summarize evidence regarding use of MOM biomarkers (MBMs) as a measure of SA in pump-dependent mothers of preterm infants in the NICU and to identify knowledge gaps requiring further investigation. Methods: An integrative review was conducted using Whittemore and Knafl methodology incorporating the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) checklist. A search using electronic databases MEDLINE (through PubMed) and CINAHL (Cumulative Index to Nursing and Allied Health Literature) and reference lists of included articles was conducted. Results: Of the 40 articles retrieved, 6 met the criteria for inclusion. Results revealed the following five findings: (1) Achievement of SA defined by MBMs is delayed and/or impaired in mothers of preterm infants. (2) MBMs are associated with pumped MOM volume. (3) Achievement of SA defined by MBMs is associated with pumping frequency. (4) Delayed and/or impaired achievement of SA defined by MBMs may be exacerbated by maternal comorbidities. (5) There is a lack of consensus as to which MBM(s) and analysis techniques should be used in research and practice. Conclusions: MBMs hold tremendous potential to document and monitor achievement of SA in mothers of preterm infants, with multiple implications for research and clinical practice.

The Interaction of Early Exclusive Mother's Milk Feeding and Ethnic Background with Ultimate Feeding Outcomes After Very Preterm Birth

Background: Mothers of very preterm infants (born under 32 weeks' gestation) have specific lactation challenges. There is little literature related to the influences on exclusive maternal milk provision. Method: An observational cohort using prospectively entered clinical data in a single tertiary neonatal unit in the United Kingdom over a 2-year period 2019-2021. There were 112 infants born under 32 weeks' gestation who fulfilled inclusion criteria. Results: Average gestation was 27.9 ± 2.6 weeks at birth and 37.3 ± 3.3 at discharge. On day 4 after birth, 29% (31/107) received exclusive maternal milk. At discharge, 54% (60/112) received exclusive maternal milk. Exclusive maternal milk at day 4 was associated with exclusive maternal milk at discharge (adjusted relative risk 2.3, 95% confidence interval 1.5-3.6, p < 0.001). Mothers from "white other," Asian, and mixed/multiple ethnic backgrounds were more likely than white British mothers to give exclusive maternal milk at discharge. This association emerged only after adjustment for exclusive maternal milk at day 4 after birth. Conclusions: The association of minority ethnic background with feeding outcomes that has previously been noted in the United Kingdom general population was also found in this very preterm cohort. The relationship was strengthened after adjustment for exclusive maternal milk at day 4. This may suggest that establishing early milk supply is a universal barrier to later exclusive maternal milk in this population and that once milk supply is established, standard social and cultural experiences come to bear on infant feeding decisions.

Breast Milk Production Variability Among Mothers of Preterm Infants

Introduction: Mothers of preterm infants are at risk for inadequate milk production. Pumping logs are often used to both encourage lactation in the first week and track its efficacy. Our objectives were to determine whether mothers of preterm infants who keep pumping logs are demographically different from those who do not and to determine whether this practice affects the amount of mother's own milk (MOM) fed to their infants. We also aimed at determining whether there is a correlation between: (1) time to first breast milk expression, (2) cumulative frequency of expression in the first week, and (3) milk volume on day 7 with subsequent milk volumes and percent of infant diet consisting of MOM. Methods: Mothers of infants born ≤32 weeks and ≤1,500 g were enrolled within 48 hours of birth and encouraged to keep a pumping log. Data were collected on maternal characteristics, patterns of milk expression, and milk volumes on days 7, 14, 21, and 28 after delivery. Infant data were collected via chart review. Results: Mothers who kept pumping logs provided their own milk for a greater percentage of their infant's feeds at the time of achieving full feeds (p = 0.017). The total number of expressions in the first week was correlated with milk volume on day 21 (p = 0.016) and the provision of a higher percentage of MOM feeds at discharge (p = 0.03). Milk volume on day 7 correlated with volumes obtained at days 14, 21, and 28 (p < 0.001). Conclusions: Pumping logs may affect the availability of MOM for preterm infants. Frequency of pumping in the first week and milk volume on day 7 may impact long-term lactation success for these women.

Trend and Predictors of Breastmilk Feeding among Very-Low-Birth-Weight Infants in NICU and at Discharge

Mothers' own milk (MOM) for premature babies is considered a life-saving drug for its proven protective action against the complications of prematurity and for effects on outcome in the short and long term, especially neurological ones. We studied the use of MOM for infants weighing <1500 g for a period of 5 years, evaluating the trend over time and the impact of some variables on human milk feeding performance. Statistical comparisons concerned the rate of feeding with breast milk during a stay in an NICU and at discharge with respect to two types of variables: (1) maternal and neonatal characteristics (gestational age, birth weight, type of pregnancy (whether single or twin), maternal age) and (2) feeding characteristics (time of the start of minimal enteral feeding and availability of MOM, days until the achievement of full enteral feeding). Group comparisons were performed using ANOVA or t-test for continuous variables and Pearson chi-squared test or Fisher exact test for categorical variables. We observed an increase, between 2017 and 2021, in MOM use (p = 0.003). The availability of the own mothers' milk occurred, on average, on the fourth day of life and improved over the years. The start of minimal enteral feeding (MEF) with human milk averaged 1.78 days, and 54.3% of VLBWs received MEF with donor milk on the first day of life. The average percentage of feeding with the mothers' milk at discharge was 47.6%, with 36.1% of exclusive MOM and an increase from 45.8% in 2017 (33.3% exclusive) to 58.82% (41.18% exclusive) in 2021. The mean average daily growth of the weight improved (p < 0.001) during this period, and there was no statistical difference between infants fed with maternal milk and those fed with bank milk. Older maternal age, early-start feeding with maternal milk and low gestational age had a statistically significant impact on feeding with MOM at discharge.

The Utilization of Sodium Concentration in Human Milk from Pump-Dependent Mothers of Preterm Infants as a Measure of Milk Production

Objective: This study investigated changes in sodium concentrations in human milk from mothers of premature infants using different breast pumps for 14 days postpartum, and the correlation between the sodium concentration in mother's own milk (MOM) and the volume pumped. Study Design: This randomized controlled study recruited 66 mothers of premature infants delivered in our hospital from February to December 2018, and we assigned them to three groups using an envelope method. In intervention group 1, a hospital-grade electric breast pump was used from postpartum day 1 to 14; in intervention group 2, a hospital-grade electric breast pump was used on postpartum days 1 to 5 and a normal personal electric breast pump on postpartum days 6 to 14; in the control group, a personal normal electric breast pump was used from postpartum day 1 to 14. Data recorded included the breast milk volume pumped and milk sodium concentration. Results: The average daily volume of MOM pumped differed statistically (p < 0.05) between the intervention and control groups at postpartum days 7 and 14. The average daily volume pumped did not differ between intervention groups 1 and 2 by postpartum day 14 (p > 0.05). However, the time taken for the sodium concentrations to normalize differed significantly (p < 0.01). At postpartum day 5, the sodium concentrations of 73% of intervention group 1 and 2 mothers were within normal limits, and they were maintained until day 14. In comparison, only 41% of the controls had normal MOM sodium levels on day 5, and they were still high on day 7 in 27.3% of controls. Conclusions: In the early stage of lactation initiation (within 5 days postpartum), using a hospital-grade electric breast pump promotes lactation in mothers who deliver prematurely and the sodium concentrations normalize more quickly. Sodium can be used as an objective biomarker of MOM to evaluate the possibility of delayed lactation in mothers of premature infants, and it could assist interventions in the early postpartum period. Trial Registration: Chinese Clinical Trial Registry, ChiCTR2200061384.

Early pumping frequency and coming to volume for mother's own milk feeding in hospitalized infants

OBJECTIVE

To identify daily pumping frequencies associated with coming to volume (CTV: producing > 500 milliliters of milk per day by postnatal day 14) for mothers of infants in the neonatal intensive care unit (NICU).

STUDY DESIGN

We compared demographics and daily pumping frequencies for mothers who did and did not experience CTV.

RESULTS

Of 427 mothers who produced milk, 201 (50.1%) experienced CTV. Race, insurance, delivery type and birthweight were associated with CTV. For mothers who experienced CTV, average pumping episodes increased daily, stabilizing at 5 pumping episodes per day by postnatal day 5 (5 × 5). Women who experienced CTV were also more likely to have pumped between 0100 and 0500 (AM pumping). In multivariable analysis birthweight, 5 × 5 and AM pumping were each independently associated with CTV.

CONCLUSION

Supporting mothers of NICU infants to achieve 5 or more daily pumping sessions by postnatal day 5 could improve likelihood of achieving CTV.

Leveraging mHealth and a milk expression frequency biomarker during postpartum to prolong lactation among parents of critically ill infants: a pilot study

OBJECTIVE

To assess the feasibility and potential benefits of personalized biomarker-based text messages in prolonging lactation among parents of critically ill infants.

STUDY DESIGN

Thirty-six participants were randomized to receive either daily texts with Mother's Own Milk (MOM) sodium levels or standard care. Surveys at months 1 and 3 assessed whether infants were receiving exclusive MOM feeding, any MOM feeding, and whether the parent was still lactating. Kaplan-Meier and log-rank tests were used for time-to-event analysis within and between intervention and control groups.

RESULTS

Participants were predominantly on Medicaid (72%), delivered infants <1500 g, and by c-section (56%). Kaplan-Meier probabilities at month 3 suggest prolonged MOM feeding (63% [0.95CI, 0.43-0.91] vs. 41% [0.95CI, 0.21-0.67]) and lactation (63% [0.95CI, 0.42-0.95] vs. 37% [0.95CI, 0.18-0.76]) in the enhanced group compared to the control group.

CONCLUSION

Personalized biomarker-based text messages are feasible and may prolong lactation and MOM feeding among parents of critically ill infants.

Trend over 25 years of risk factors of mother's own milk provision to very low birth weight infants at discharge

BACKGROUND

Feeding mother's own milk (MOM) is associated with reduced morbidity of very low birth weight (VLBW) infants (<1500 g), but not all mothers are able to provide pumped breast milk or breastfeed until discharge.

AIMS

To investigate the duration of MOM feeding and identify risk factors for cessation.

STUDY DESIGN

Single-center retrospective cohort study.

SUBJECTS

307 VLBW infants born 2012 and 2019 surviving beyond 7 days of life.

OUTCOME MEASURES

Analysis of MOM feeding at discharge, including comparison with a historical cohort of infants born 1992-1994.

RESULTS

MOM feeding was initiated in 178/180 infants (98.9 %) born in 2012 and in 123/127 infants (96.9 %) born in 2019 (p = 0.132), as compared to 73/89 (82 %) infants born 1992-1994 (p < 0.001). Median [range] duration of MOM feeding was similar for infants born in 2012 (45 [0-170] days) and 2019 (50 [0-190] days) (p = 0.396), but much longer than in the historical cohort (36 [0-152] days) (p < 0.001). The overall breastfeeding rate increased up to 69.2 % and 77.2 %. Factors associated with cessation of MOM feeding were smoking during pregnancy, single-mother status, short (<12 years) duration of maternal or paternal school education (all p ≤ 0.001), natural conception, birth weight ≥ 1000 g, and gestational age ≥ 29 weeks (p < 0.05). In Cox proportional hazard multivariate analysis, smoking during pregnancy and single-mother status remained independent risk factors.

CONCLUSIONS

Duration of MOM feeding and breastfeeding rates of VLBW infants during hospital stay have increased significantly during the last 30 years, while smoking and indicators of low socioeconomic status remain dominant predictors of cessation of MOM feeding.

Human Milk Sodium and Potassium as Markers of Mastitis in Mothers of Preterm Infants

Introduction: This prospective longitudinal study examined changes in milk sodium concentration (Na) and sodium:potassium ratio (Na:K), microbiological culture, milk production, and breast health in relation to mastitis after preterm birth. Methods: We studied women who gave birth at 29-34 weeks of gestation in a tertiary obstetric hospital in Perth, Western Australia. Milk samples, 24-hour milk production, and breast health data were collected every second day to day 10 postpartum, then every third day until infant discharge from the neonatal unit. Milk Na and K were measured at point of care (POC) using handheld ion selective meters, and Na:K calculated. Cultures were performed on postnatal days 8, 13, and every 6 days thereafter. For episodes of mastitis, milk was cultured at onset, and Na and Na:K measured daily until resolution. Women were followed up at 4 and 8 weeks postpartum. Results: In a sample of 44 women, 4 mastitis cases were detected in 3 women during their infants' neonatal stay; all had elevated milk Na and Na:K that resolved within 48 hours; 2/4 experienced reduced milk production and 1/4 had heavy growth of Staphylococcus epidermidis. A further 2 mastitis cases were reported in 39 women followed up to 8 weeks postpartum. Four women had elevated milk Na and Na:K without clinical signs of mastitis; three also had reduced milk production. Conclusions: POC testing of milk Na and/or Na:K may offer a useful indicator of breast health. Mastitis may cause an acute reduction in milk production regardless of the presence of culture-positive infection.

Milk Volume Outcomes in Pump-Dependent Mothers of Critically Ill Infants

INTRODUCTION

Mother's own milk improves health outcomes in infants of all gestational ages. Although pump-dependent mothers of extremely premature infants are at risk of insufficient milk production, whether mother's milk production is impacted by gestational age and pump dependency in mothers of more mature critically ill infants is unknown.

PURPOSE

To determine whether there is a relationship between gestational age, milk production, and time to secretory activation in mothers delivering a critically ill infant.

METHODS

A convenience sample of 136 pump-dependent mothers whose infants were admitted to the neonatal intensive care unit was enrolled between 2013 and 2016 as part of a quality improvement project. Group 1 (early preterm) delivered infants at 30 to 33 weeks of gestation (n = 41), group 2 (late preterm) 34 to 36 weeks (n = 48), and group 3 (term) 37 weeks and more (n = 47). Milk volume on days 1 to 7 was measured by weighing each vial of expressed milk and compared using general linear mixed-model analysis. Time to the onset of secretory activation was compared using censored regression analysis.

RESULTS

Main effect for gestational age controlling for day was statistically significant (P = .0234). The early preterm group produced more milk over the 7-day study than the term (P = .01) and late preterm (P = .02) groups. The early preterm group achieved secretory activation earlier than the late preterm group (adjusted P = .039).

IMPLICATIONS FOR PRACTICE

Pump-dependent mothers of all infants admitted to the neonatal intensive care unit may be at risk of inadequate milk production and delayed secretory activation and may therefore benefit from early milk production monitoring and lactation support.

IMPLICATIONS FOR RESEARCH

Further studies should examine targeted interventions to increase milk production in pump-dependent mothers.

Relationship Between the Rates of Breast Milk Production of Preterm Mothers in the First Week Post-Delivery and Continuation of Breastfeeding Through Discharge

Background

Mothers of preterm infants born between 26- and 35-weeks’ gestation often report challenges with maintaining a pumping schedule and experience perceptions of low milk supply, both of which may contribute to early termination of breastfeeding within the first few weeks.

Purpose

The purpose of this study was to assess the relationship between the amount of expressed milk volumes in the first 2 weeks after delivery and infant’s continuing to receive mother’s milk at hospital discharge. These results were part of a larger study that examined multiple maternal variables that may impact the amount of milk volumes and continuation of breastfeeding in the preterm infant admitted to the NICU.

Methods

Mothers of infants (N = 37) in the NICU were recruited for this correlational, longitudinal study. Data was collected at 24–48 hours post-delivery, at 2 weeks, at 4 weeks from mothers participating in the study and from infant chart reviews.

Results/Outcomes

Mothers who reported higher expressed milk volumes at 3 days post-delivery had consistently higher volumes of expressed breast milk and a higher percentage of continued breastfeeding at hospital discharge. There was no statistically significant relationship between breastfeeding self-efficacy scores, socio-demographic variables, or pumping frequency and the percentage of infants receiving breast milk at hospital discharge. Overall, 76.4% of the infants enrolled in the study were receiving 100% of their intake with fortified mother’s milk at hospital discharge.

Discussion/Implications for Practice

The use of a breast pump log in the first 2 weeks to monitor milk volumes may assist in predicting mothers who are at risk of lower milk supply and early discontinuation of breastfeeding.

Strategies to Improve Mother's Own Milk Expression in Black and Hispanic Mothers of Premature Infants

BACKGROUND

Mother's own milk (MOM) is the gold standard of nutrition for premature infants. Yet, Hispanic and Black preterm infants are less likely than their White counterparts to receive MOM feedings. Evidence is lacking concerning potential modifiable factors and evidence-based strategies that predict provision of MOM among minority mothers of premature infants.

PURPOSE

A review of the literature was conducted to answer the clinical question: "What evidence-based strategies encourage and improve mother's own milk expression in Black and Hispanic mothers of premature infants?"

METHODS/SEARCH STRATEGY

Multiple databases including PubMed, Cochrane, and CINAHL were searched for articles published in the past 10 years (2010 through May 2020), reporting original research and available in English. Initial search yielded zero articles specifically addressing the impact of lactation interventions on MOM provision in minority mothers. Additional studies were included and reviewed if addressed breastfeeding facilitators and barriers (n = 3) and neonatal intensive care unit breastfeeding support practices (n = 7).

FINDINGS/RESULTS

Current strategies used to encourage and improve MOM expression in minority mothers are based on or extrapolated from successful strategies developed and tested in predominantly White mothers. However, limited evidence suggests that variation in neonatal intensive care unit breastfeeding support practices may explain (in part) variation in disparities and supports further research in this area.

IMPLICATIONS FOR PRACTICE

Neonatal intensive care unit staff should consider implementing scaled up or bundled strategies showing promise in improving MOM milk expression among minorities while taking into consideration the cultural and racial norms influencing breastfeeding decisions and practice.

IMPLICATIONS FOR RESEARCH

Experimental studies are needed to evaluate the effectiveness of targeted and culturally sensitive lactation support interventions in Hispanic and Black mothers.

Proactive Lactation Care is Associated With Improved Outcomes in a Referral NICU

BACKGROUND

Mother's milk improves outcomes. Referral neonatal intensive care units face unique lactation challenges with maternal-infant separation and maternal pump dependency. Little is known about lactation resource allocation in this high-risk population.

RESEARCH AIMS

To determine differences in human milk outcomes, (1) the proportion of infants fed exclusive or any mother's milk and (2) recorded number and volume of pumped mothers' milk bottles, between two models of lactation care in a referral neonatal intensive care unit.

METHODS

This retrospective, longitudinal, two-group comparison study utilized medical record individual feeding data for infants admitted at ≤ Day 7 of age and milk room storage records from reactive and proactive care model time periods (April, 2017-March, 2018; May, 2018-April, 2019). The reactive care model (n = 509 infants, 58% male, median birth weight and gestational age of 37 weeks,) involved International Board Certified Lactation Consultant referral for identified lactation problems; whereas, the proactive model (n = 472 infants, 56% male, median birth weight and gestational age 37 weeks) increased International Board Certified Lactation Consultant staffing, who then saw all admissions. Comparisons were performed using chi square, Mann Whitney, and t-tests.

RESULTS

A proactive lactation approach was associated with an increase in the receipt of any mother's milk from 74.3% to 80.2% (p = .03) among participants in the proactive model group. Additionally, their milk room mean monthly bottle storage increased from 5153 (SD 788) to 6620 (SD 1314) bottles (p < .01).

CONCLUSIONS

In this retrospective study at a tertiary referral neonatal intensive care unit, significant improvement inhuman milk outcomes suggests that increased resources for proactive lactation care may improve mother's milk provision for a high-risk population.

Study protocol for reducing disparity in receipt of mother's own milk in very low birth weight infants (ReDiMOM): a randomized trial to improve adherence to sustained maternal breast pump use

BACKGROUND

Black very low birth weight (VLBW; < 1500 g birth weight) and very preterm (VP, < 32 weeks gestational age, inclusive of extremely preterm, < 28 weeks gestational age) infants are significantly less likely than other VLBW and VP infants to receive mother's own milk (MOM) through to discharge from the neonatal intensive care unit (NICU). The costs associated with adhering to pumping maternal breast milk are borne by mothers and contribute to this disparity. This randomized controlled trial tests the effectiveness and cost-effectiveness of an intervention to offset maternal costs associated with pumping.

METHODS

This randomized control trial will enroll 284 mothers and their VP infants to test an intervention (NICU acquires MOM) developed to facilitate maternal adherence to breast pump use by offsetting maternal costs that serve as barriers to sustaining MOM feedings and the receipt of MOM at NICU discharge. Compared to current standard of care (mother provides MOM), the intervention bundle includes three components: a) free hospital-grade electric breast pump, b) pickup of MOM, and c) payment for opportunity costs. The primary outcome is infant receipt of MOM at the time of NICU discharge, and secondary outcomes include infant receipt of any MOM during the NICU hospitalization, duration of MOM feedings (days), and cumulative dose of MOM feedings (total mL/kg of MOM) received by the infant during the NICU hospitalization; maternal duration of MOM pumping (days) and volume of MOM pumped (mLs); and total cost of NICU care. Additionally, we will compare the cost of the NICU acquiring MOM versus NICU acquiring donor human milk if MOM is not available and the cost-effectiveness of the intervention (NICU acquires MOM) versus standard of care (mother provides MOM).

DISCUSSION

This trial will determine the effectiveness of an economic intervention that transfers the costs of feeding VLBWand VP infants from mothers to the NICU to address the disparity in the receipt of MOM feedings at NICU discharge by Black infants. The cost-effectiveness analysis will provide data that inform the adoption and scalability of this intervention.

TRIAL REGISTRATION

ClinicalTrials.gov: NCT04540575 , registered September 7, 2020.

Effects of a WeChat Mini-Program on Human Milk Feeding Rates in a Neonatal Intensive Care Unit During the COVID-19 Pandemic

OBJECTIVE

We investigated changes in maternal daily milk pumping frequency and milk volume per expression and their derived lactation indicators, as well as human milk (HM) feeding status with a focus on amount and rates in preterm infants admitted to the neonatal intensive care unit (NICU) after using a WeChat mini-program during the 2019 coronavirus (COVID-19) pandemic.

METHODS

The study was conducted with 482 mothers and their 544 babies. We prospectively enrolled mothers and infants with birth weight <1,500 g or gestational age <32 weeks born in 2020, and retrospectively included the same population in 2019. All study subjects were classified into three subgroups: pre-pandemic (PP, 2019), early pandemic (EP, January to April 2020), and late pandemic (LP, May to December 2020). From 1 January 2020, mothers recorded in an online pumping diary using the WeChat mini-program. We obtained the infants' feeding information from an online database for analysis.

RESULTS

Maternal lactation indicators did not change significantly. However, 56.7% (139/245) of mothers achieved milk volume ≥500 ml/day (CTV) in PP, 58.9% (33/156) in EP, and a slight increase to 60.7% (91/150) in LP. Maternal pumping frequency remained about eight times/day. In LP, daily milk volume was higher than the other two periods from day 4, and mothers achieved CTV by day 12, which was achieved in the other two groups by 13-14 days. There were several statistical differences in the amount and rates of feeding between the groups, particularly about HM and donor milk feeding, with the vast majority being decreased during EP, while during LP they returned to PP levels. Pleasingly, the median average daily dose of HM at 1-28 days was highest in LP (LP, 87.8 vs. PP, 75.5 or EP, 52.6 ml/kg/day, P _corrected < 0.001). In addition, most categorical feeding indicators decreased in EP and recovered in LP.

CONCLUSION

An education model based on the WeChat program could aid lactation education and management in mothers of preterm infants to maintain healthy lactation. The model, together with optimized management strategies, can ensure that the HM feeding rate is not compromised in vulnerable high-risk infants during NICU hospitalization in a public health emergency, like the COVID-19 pandemic.

Factors Associated With Breastfeeding Very Low Birth Weight Infants at Neonatal Intensive Care Unit Discharge: A Single-Center Brazilian Experience

BACKGROUND

The mothers of very low birth weight infants face many challenges to achieve breastfeeding at hospital discharge, especially during long stays.

RESEARCH AIM

The aim of this study was to describe the incidence and factors associated with breastfeeding rates (exclusive or with formula) at discharge, for very low birth weight infants, in a private Neonatal Intensive Care Unit in southern Brazil.

METHODS

We conducted a prospective longitudinal cohort study of infants (N = 335) with very low birth weight and/or less than 30 weeks gestational age, who survived to discharge and had no contraindication to mother's own milk. Participants were initially divided into three groups (exclusive breastfeeding, some breastfeeding, and no breastfeeding) based on their feedings at discharge; however, later, two groups were analyzed (any breastfeeding, no breastfeeding).

RESULTS

Most (93.4%; n = 313) were breastfeeding directly at least once daily at discharge, of which 16.1% (n = 54) were receiving exclusive mother's milk and 77.3% (n = 259) mixed feeding (mother's milk and formula). Breastfeeding at discharge was associated with gestational age ≥ 28 weeks, higher birth weight, not developing neonatal sepsis or bronchopulmonary dysplasia during the hospital stay, shorter lengths of stay, and lower weight at discharge. After Poisson regression, breastfeeding at discharge was associated only with a shorter length of stay (RR 0.98; CI 95% [0.95, 0.99], p < .05).

CONCLUSIONS

In our single unit experience in Brazil, most infants were breastfeeding at discharge. NICU staff might address mothers of infants who have prolonged hospitalization with specific strategies. Mothers and infants at risk can be identified early and personalized interventions can be developed for improving breastfeeding rates at discharge.

Promoting Human Milk and Breastfeeding for the Very Low Birth Weight Infant

Provision of mother's own milk for hospitalized very low birth weight (VLBW) (≤1500 g) infants in the NICU provides short- and long-term health benefits. Mother's own milk, appropriately fortified, is the optimal nutrition source for VLBW infants. Every mother should receive information about the critical importance of mother's own milk to the health of a VLBW infant. Pasteurized human donor milk is recommended when mother's own milk is not available or sufficient. Neonatal health care providers can support lactation in the NICU and potentially reduce disparities in the provision of mother's own milk by providing institutional supports for early and frequent milk expression and by promoting skin-to-skin contact and direct breastfeeding, when appropriate. Promotion of human milk and breastfeeding for VLBW infants requires multidisciplinary and system-wide adoption of lactation support practices.

Effect of Postpartum Depo Medroxyprogesterone Acetate on Lactation in Mothers of Very Low-Birth-Weight Infants

Objective: This study examined the effect of postpartum administration of depo medroxyprogesterone acetate (DMPA) on milk production, time to onset of secretory activation, lactation duration, and infant consumption of mother's own milk (MOM) in mothers of preterm very low-birth-weight (VLBW) infants. Materials and Methods: We conducted a secondary analysis of data from mothers who delivered infants weighing ≤1,500 g and at ≤32 weeks' gestation. The volume of milk produced was measured on days 1-7, 14, and 21 by weighing all expressed milk on an electronic scale. Time to secretory activation was determined through self-report of a feeling of breast fullness. Information on lactation duration and the percent of feeds consisting of MOM consumed by infants was obtained from the medical records. Results: Mothers who received postpartum DMPA were more likely to be African American (72.4% versus 31.4%; p = 0.0006), unemployed (65.5% versus 44.5%; p = 0.027), and Medicaid eligible (89.7% versus 67.2%; p = 0.019). There were no differences in daily milk production between mothers who received DMPA before hospital discharge (n = 29) compared with those who did not (n = 141). When mothers who reached secretory activation before receiving DMPA were removed from analysis, receiving DMPA was associated with a later onset of secretory activation (103.7 versus 88.6 hours; p = 0.028). There were no statistically significant differences between the study groups in lactation duration or infant MOM consumption. Conclusions: DMPA, when administered postpartum to mothers of preterm VLBW infants, delayed secretory activation, but had no detrimental effect on milk production or lactation duration. Clinical Trial Registration: ClinicalTrials.gov Identifier: NCT01892085.

Human Milk for the Term Newborn

Human milk provides optimal nutrition for term newborns, but the prevalence of its use is below target, and risks have been identified. Infants of black mothers as well as term newborns admitted to the neonatal intensive care unit are at risk for not receiving human milk. To improve human milk intake, multiple individual-level interventions have been shown to be effective, but some popular system-level interventions are ineffective or harmful. Expressed milk and donor milk may be less beneficial than direct breastfeeding. Nuanced public policies can help support lactation while promoting individual choice and equity.

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.

Mother's Own Milk Feeding in Preterm Newborns Admitted to the Neonatal Intensive Care Unit or Special-Care Nursery: Obstacles, Interventions, Risk Calculation

Early nutrition of newborns significantly influences their long-term health. Mother's own milk (MOM) feeding lowers the incidence of complications in preterm infants and improves long-term health. Unfortunately, prematurity raises barriers for the initiation of MOM feeding and its continuation. Mother and child are separated in most institutions, sucking and swallowing is immature, and respiratory support hinders breastfeeding. As part of a quality-improvement project, we review the published evidence on risk factors of sustained MOM feeding in preterm neonates. Modifiable factors such as timing of skin-to-skin contact, strategies of milk expression, and infant feeding or mode of delivery have been described. Other factors such as gestational age or neonatal complications are unmodifiable, but their recognition allows targeted interventions to improve MOM feeding. All preterm newborns below 34 weeks gestational age discharged over a two-year period from our large German level III neonatal center were reviewed to compare institutional data with the published evidence regarding MOM feeding at discharge from hospital. Based on local data, a risk score for non-MOM feeding can be calculated that helps to identify mother-baby dyads at risk of non-MOM feeding.

A Breast Milk Pump at the Bedside: A Project to Increase Milk Production in Mothers of Very Low Birth Weight Infants

The amount of milk production in mothers of babies admitted to the neonatal intensive care unit (NICU) is mostly determined by some actions focused on the first hours and days after birth. Working for an improvement in our previous results in terms of maternal expressed breast milk (MEBM) production, we designed a pilot project and a small observational study. After increasing the number of breast milk pumps to allow full-time availability and implementing educational strategies and updated information for parents, the volume of MEBM production by day 14 after birth was doubled and increased to >500 mL per day. The rate of exclusive breastfeeding at discharge improved from 26.67% to 76.19%. The cost of the use of donor milk per patient decreased by 15.7%. This study is an example of a cost-beneficial quality improvement strategy. It demonstrates the importance of an optimal supply of breast milk pumps in NICU and educational interventions focused on enhancing MEBM production.

Impact of Institutional Breastfeeding Support in Very Low-Birth Weight Infants

Background and Objectives: Feeding of human milk is associated with improved health outcomes in preterm infants. Mothers of preterm infants have difficulty establishing and maintaining an adequate milk supply. Our institution participated in Best Fed Beginnings (BFB), a national breastfeeding quality improvement collaborative, in 2012. Although most practice changes targeted healthy term infants, we hypothesized that mother's milk feeding (MMF) to preterm infants would also improve. Our objective was to compare MMF in very low-birth weight (VLBW) infants at discharge before and after our participation in BFB. Materials and Methods: We completed a retrospective chart review of VLBW infants born between January 2006 and June 2016. The primary outcome measure was the percentage of VLBW infants receiving MMF at hospital discharge. We used Fisher's exact test to determine the difference before and after 2012 and performed the Kruskal-Wallis test to determine changes in median time to pump initiation in mothers of VLBW infants. Multiple logistic regression was used to determine variables associated with the primary outcome. Results: A total of 1,077 VLBW infants were eligible. After launching BFB, MMF at discharge increased in VLBW infants, from 35.2% to 46.0%, p < 0.001. Median time to pump initiation decreased from 11 to 5 hours after 2012, p = 0.0001. Factors significantly associated with receiving MMF at discharge included birth post-BFB; private insurance; non-Black race; shorter length of stay; older maternal age; and mother's milk as first feeding. Conclusions: Hospital culture supportive of breastfeeding impacts not only healthy term infants but also VLBW infants. Earlier initiation of milk expression significantly improves provision of MMF to preterm infants at discharge.

Maternal production of milk for infants in the neonatal intensive care unit

Mother's own milk (MOM) feeding is a cost-effective strategy to reduce risks of comorbidities associated with prematurity and improve long-term health of infants hospitalized in the Neonatal Intensive Care Unit (NICU). Significant racial and socioeconomic disparities exist in MOM provision in the NICU, highlighting the importance of developing strategies to reduce these disparities. Mothers of infants in the NICU experience many health concerns which may negatively impact lactation physiology. Objective measures of lactation physiology are limited but may assist in identifying mothers at particular risk. Several strategies to assist mothers of hospitalized infants are essential, including maternal education, qualified lactation professionals, early and frequent milk expression with a hospital-grade double electric breast pump, and providing support for transitioning to direct breastfeeding prior to discharge from the NICU.

The Critical Window of Opportunity: Lactation Initiation Following Cesarean Birth

Introduction: Cesarean birth is reported to be risk factor for the delayed onset of maternal lactation. The purpose of this study was to describe the timing of lactation initiation, subsequent feeding/milk expression patterns, and daily milk volumes among women who had a cesarean birth of an infant with a known congenital anomaly during the 3-day postpartum hospital stay. Materials and Methods: Retrospective descriptive cohort study. The electronic medical records of dyads, between 2014 and 2017 at the study setting, were abstracted for demographic and clinical data. Milk expression and milk volume data were abstracted from maternal lactation logs. Data were analyzed using descriptive statistics. Results: Among the cohort (n = 468 dyads), the mean time from infant delivery by cesarean to lactation initiation was 257.5 minutes. The cohort was divided into three groups by the timing of lactation initiation: EARLY (≤60 minutes; n = 112), MID (>60 minutes to ≤360 minutes; n = 309), and LATE (>360 minutes; n = 47). Statistically significant differences are seen between groups for the daily means: number of feeds/pumps and maternal milk volumes (irrespective of the presence of lactation risk factors). Discussion: This is the first study to explore the relationship of lactation initiation among women postcesarean birth whose infants have a known congenital anomaly. The time between the infant's birth and the first feed/milk expression, and the patterns of feeding/milk expression during the postpartum hospital stay, are key drivers for maternal milk supply.

Racial and socioeconomic disparities in breast milk feedings in US neonatal intensive care units

Very low birth weight (VLBW; <1500 g birth weight) infants are substantially more likely to be born to black than to non-black mothers, predisposing them to potentially preventable morbidities that increase the risk for costly lifelong health problems. Mothers' own milk (MOM) may be considered the ultimate "personalized medicine" since milk composition and bioactive components vary among mothers and multiple milk constituents provide specific protection based on shared exposures between mother and infant. MOM feedings reduce the risks and associated costs of prematurity-associated morbidities, with the greatest reduction afforded by MOM through to NICU discharge. Although black and non-black mothers have similar lactation goals and initiation rates, black VLBW infants are half as likely to receive MOM at NICU discharge in the United States. Black mothers are significantly more likely to be low-income, single heads of household and have more children in the home, increasing the burden of MOM provision. Although rarely considered, the out-of-pocket and opportunity costs associated with providing MOM for VLBW infants are especially onerous for black mothers. When MOM is not available, the NICU assumes the costs of inferior substitutes for MOM, contributing further to disparate outcomes. Novel strategies to mitigate these disparities are urgently needed. IMPACT: Mother's own milk exemplifies personalized medicine through its unique biologic activity. Hospital factors and social determinants of health are associated with mother's own milk feedings for very low-birth-weight infants in the neonatal intensive care unit. Notably, out-of-pocket and opportunity costs associated with providing mother's own milk are borne by mothers. Conceptualizing mother's own milk feedings as an integral part of NICU care requires consideration of who bears the costs of MOM provision-the mother or the NICU?

Mother's Own Milk Biomarkers Predict Coming to Volume in Pump-Dependent Mothers of Preterm Infants

OBJECTIVE

To assess serial secretory activation biomarker concentrations (sodium [Na], potassium [K], Na:K, protein, lactose, and citrate) in mother's own milk (MOM) from breast pump-dependent mothers of preterm infants to determine associations with coming to volume (CTV), defined as producing at least 500 mL/day MOM by day 14 postpartum.

STUDY DESIGN

We collected serial MOM samples and pumped MOM volume data for 14 days postpartum in mothers who delivered at <33 weeks of gestation. Regression models and the Mann-Whitney U test were used to evaluate associations.

RESULTS

Among 40 mothers, 39 (mean gestational age, 28.8 weeks; 67% overweight/obese; 59% nonwhite) had paired MOM volume and biomarker data; 33% achieved CTV between postpartum days 6 and 14. In univariate models, MOM Na on postpartum day 5 and Na:K on days 3 and 5 were associated with CTV. Mothers achieving CTV were more likely to have postpartum Na:K ≤1 on day 3 (75% vs 25%; P = .06) and ≤0.8 on day 5 (69% vs 10%; P < .01). In a multivariable regression model, day 5 Na:K (1 unit decrease in Na:K: OR, 18.7; 95% CI, 1.13-311.41; P = .049) and maternal prepregnancy body mass index (BMI) (1 unit increase in BMI: OR, 0.88; 95% CI, 0.78-0.99; P = .04) were associated with CTV between postpartum days 6 and 14.

CONCLUSIONS

Secretory activation and CTV were compromised in breast pump-dependent mothers with preterm delivery. CTV was predicted by MOM Na level and Na:K. These biomarkers have potential as objective point-of-care measures to detect potentially modifiable lactation problems in a high-risk population.

Short-term rate of milk synthesis and expression interval of preterm mothers

AIM

To determine the impact of the pumping regimes of women with preterm infants on the daily milk production, and on the short-term rate of milk synthesis during early lactation to support evidence-based recommendations for optimising milk production.

METHODS

Mothers of preterm infants (n=25) recorded start time, finish time and expression volumes from every breast expression on days 10, 15-20 postpartum.

RESULTS

Expressing more often than five times per day did not result in a significant increase in daily milk production. Milk volume per expression per breast increased for intervals between expressions of between 2and6 hours then reached a plateau when the interval between expression was 7 hours or longer. The short-term rate of milk synthesis decreased as the interval between expressions increased until about 7.5 hours at which point it begun to increase (p value associated with interval between expressions^2<0.001).

CONCLUSION

The strong inverse association between the short-term rate of milk synthesis and the interval between expressions for intervals up to 7 hours suggest that the maximum interval between expressions should be 7 hours. Data suggest that, on average, the mothers should express at least five times a day to maximise daily milk production. Considering inter-individual variation, determination of an individual mother's maximum interval between expressions that does not compromise the short-term rate of milk synthesis will help to optimise daily milk production while minimising the demands on the mother's time.