Using milk flow rate to investigate milk ejection in the left and right breasts during simultaneous breast expression in women

<p>Abstract</p> <p>Background</p> <p>Milk ejection is essential for a successful lactation, however techniques to measure milk ejection in women are often complex and invasive. Recent research has demonstrated that at milk ejection, milk duct diameter increased in the breast (measured by ultrasound) at the same time as milk flow rate increased (measured using a weigh balance). This study aimed to evaluate a purpose-built continuous weigh balance (Showmilk, Medela AG) to measure changes in milk flow rate from the breast to identify milk ejections during milk expression. In addition, the Showmilk was used to determine if milk ejection occurred simultaneously in both breasts during double pumping.</p> <p>Methods</p> <p>Increased milk flow rates during single pumping were compared to simultaneous ultrasound measurements of increased milk duct diameters in 14 mothers. In addition, increases in milk flow rate were compared between the left and right breasts of 28 mothers during double pumping for 15 minutes with two separate electric breast pumps attached to two Showmilks to record milk flow rate.</p> <p>Results</p> <p>Increased milk flow rates were associated with increased milk duct diameters during single pumping. The mean number of milk ejections was not different between the Showmilk (4.2 ± 2.0) and ultrasound (4.5 ± 1.5) techniques. Overall, 67 milk ejections were measured and of these, 48 (72%) were identified by both techniques. The left and right breasts responded synchronously with 95.5% of the flow rate increases corresponding between the breasts. The mean number of milk ejections identified by an increase in milk flow rate during double pumping was 5.1 ± 1.7 and 5.0 ± 1.7 for the left and right breasts, respectively. In addition, mothers chose the same expression vacuum for the left (-198 ± 31 mmHg) and right (193 ± 33 mmHg) breasts.</p> <p>Conclusion</p> <p>The Showmilk can simply and non-invasively record milk ejections by measuring increases in milk flow rate that correspond with increases in milk duct diameter. For the first time measurement of milk flow rate has been used to confirm that milk ejections occur simultaneously in the left and right breasts during double pumping. The use of the Showmilk will facilitate further research into the relationship of milk ejection and milk removal.</p

Report of a Staff Program to Promote and Support Breastfeeding in the Care of Vulnerable Infants at a Children's Hospital

Ill or premature infants do not have the opportunity to begin breastfeeding in an optimal manner; yet, these infants may benefit most from human milk. Health-care providers' knowledge of breastfeeding in both healthy and ill infants is frequently limited due to deficits in training. This article outlines a multifaceted approach to develop a comprehensive, hospital-wide system to support and promote breastfeeding for vulnerable infants. This approach was designed for the staff of the Children's Hospital of Philadelphia

Mothers Who Engage in Long-Term Informal Milk Sharing.

Human milk has repeatedly been shown to be the best form of infant nutrition. Many reasons may prevent a family from providing human milk to their child, leaving them to seek other options. One alternative is informal milk sharing, where individuals and families find donor milk through online communities. We present perspectives from three mothers who used informal milk sharing for at least 6 months. Common themes identified are sadness, guilt, and stigmatization of informal milk sharing. Implications for practice include providing families and practitioners with resources for learning about informal milk sharing and navigating the community safely

Obesity as a Predictor of Delayed Lactogenesis II

Background: Lactogenesis II is the onset of copious milk production. A delay in this has been associated with an increased risk of formula supplementation and early cessation of breastfeeding. Prepregnancy obesity has also been associated with decreased breastfeeding rates and early cessation.  Research aim: This study aimed to evaluate the effect of prepregnancy obesity on self-reported delayed lactogenesis II.  Methods: We conducted a prospective observational cohort study of 216 women with a singleton pregnancy and who planned to breastfeed. We compared the onset of lactogenesis II between women with a body mass index (BMI) <30 kg/ m2 and women with a BMI = 30 kg/ m2. Using multivariate logistic regression analyses, we assessed the relationship between maternal BMI and delay of lactogenesis II.  Results: The prevalence of delayed lactogenesis II among women with prepregnancy BMI < 30 kg/m2 and BMI ≥ 30 kg/m2 was46.4% and 57.9%, respectively. Delayed lactogenesis II occurred more frequently among women who were obese at the timeof delivery (p < .05). After controlling for the covariates, age, prepregnancy BMI, and gestational weight gain were positivelyassociated with delayed lactogenesis II. Conclusion: Prepregnancy obesity and excessive gestational weight gain are associated with an increased risk of delayedlactogenesis II. Women who are at risk for delay in lactogenesis II and early breastfeeding cessation will need targetedinterventions and support for them to achieve their personal breastfeeding goals

Effect of Promoter Polymorphisms on Cytokine Concentration in Preterm Breast Milk and Subsequent Infant Outcomes

Background: Breast milk concentrations of immune components are variable between women and interleukin (IL) differences may be associated with infant outcomes. Molecular mechanisms for milk variability remain unknown. Objective: The aims were to (1) examine the relationship between maternal IL genotypes and milk concentrations of IL4, IL6, and IL10, (2) describe the trajectories of milk IL change, (3) examine whether maternal IL genotypes predict IL trajectories and/or average weekly IL concentration, and (4) examine if weekly IL levels and/or IL trajectories are associated with infant outcomes. Methods: Milk aliquots were collected from each feeding of mother’s own milk and pooled weekly. DNA was extracted from 1 sample of each mother’s breast milk whey (n = 64), and single nucleotide polymorphisms (SNPs) of IL genes were genotyped. Milk IL concentrations were measured and trajectory analysis examined IL milk change over time. Multivariate breast milk IL concentration analyses controlled for gestational age and prepregnancy body mass index. Multivariate infant outcome (n = 73) analyses controlled for gestational age and the ratio of human milk to total milk. Results: Trajectory analysis resulted in linear group shapes, with 2 distinct subgroups in IL6 and 3 subgroups in IL4 and IL10. Trajectory groups trended toward significance with calprotectin, intraventricular hemorrhage, and blood transfusions. Multivariate analyses resulted in trending associations between maternal SNPs and subsequent IL6 and IL10 milk levels. There was a trending relationship between IL milk levels and both fecal calprotectin and intraventricular hemorrhage. Conclusion: Maternal IL SNPs may affect IL breast milk levels and IL milk levels may be associated with infant outcomes

Maternal Interleukin Genotypes Are Associated With NICU Outcomes Among Low-Birth-Weight Infants

Background: Maternal interleukin (IL) single nucleotide polymorphisms (SNPs) are associated with obstetrical outcomes. Conversely, infant SNPs are associated with subsequent neonatal intensive care unit (NICU) outcomes. Little is known about relationships between maternal SNPs and neonatal outcomes. Purpose: To examine the relationships between maternal IL genotypes and neonatal outcomes. Methods: An ancillary study was conducted among mothers (N = 63) who delivered very low-birth-weight infants (N = 74). Maternal DNA was extracted from breast milk and genotyped. Outcomes included fecal calprotectin, length of stay, scores for neonatal acute physiology with perinatal extension (SNAPPE-II), weight gain, oxygen needs, necrotizing enterocolitis, intraventricular hemorrhage, sepsis, retinopathy of prematurity, blood transfusions, and feeding intolerance. Multivariate analyses examined the relationships between maternal IL SNPs and outcomes, controlling for gestational age and the ratio of maternal milk to total milk. Results: Absence of a minor allele in 2 IL6 SNPs was associated with fecal calprotectin (p = .0222, p = .0429), length of stay (p = .0158), SNAPPE-II (p = .0497), weight gain (p = .0272), and days on oxygen (p = .0316). IL6 genotype GG (rs1800795) was associated with length of stay (p = .0034) and calprotectin (p = .0213). Minor-allele absence in 2 IL10 SNPs was associated with days on oxygen (p = .0320). There were associations between IL10 genotype TT (rs1800871) and calprotectin (p = .0270) and between IL10 genotypes AA (rs1800872 and rs1800896) and calprotectin (p = .0158, p = .0045). Conclusion: Maternal IL SNPs are associated with NICU outcomes. A potential clinical application includes an antenatal risk profile to identify neonatal needs

Updating Clinical Practices to Promote and Protect Human Milk and Breastfeeding in a COVID-19 Era

The COVID-19 pandemic has impacted breastfeeding and lactation globally, with clinical practices implemented early in the pandemic being mostly anti-breastfeeding, e.g., separation of mothers from their infants, and not evidence based. As the pandemic has progressed, evidence has emerged reconfirming the value of human milk and the importance of protecting and supporting breastfeeding, especially the initiation of lactation. However, it is clear that COVID-19 has changed the clinical care paradigm around breastfeeding and lactation support and, as such, it is imperative that practices adapt and evolve to maintain the emphasis on lactation support. We participated in a round table conference aiming to rescue and develop protocols and practices that support breastfeeding during the COVID-19 pandemic. One key area to target will be to maximize the use of the antenatal period. The early identification of lactation risk factors together with the development of person-centered methods to deliver breastfeeding information and education to parents-to-be will be critical. In addition, the establishment of a hospital culture that values breastfeeding and prioritizes the use of human milk will be integral for the motivation of health care professionals. That culture will also support active management of the initiation of lactation and the development of a 'back-up plan' toolkit to support the mother experiencing lactation difficulties. Post-discharge support will also be crucial with the development of both in-person and virtual lactation support programs, in particular for the immediate post-discharge period to benefit mothers who experience an early discharge process. These measures will allow for a new, adapted framework of practice that acknowledges the current COVID-19 paradigm and maintains the emphasis on the need to protect and support breastfeeding and the use of human milk