Breastfeeding Medicine最新文献

Introduction: Human breast milk macronutrients play a vital role in the development of breastfed infants and are known to be influenced by several factors. There is limited information on the influence of cannabis use during lactation on these macronutrients. Given the rising use of cannabis among lactating women with its widespread legalization, this study aimed to examine the association of cannabis use during lactation on breast milk macronutrients. Materials and Methods: A cross-sectional study design was used and 637 breast milk samples with measured macronutrients were utilized. Of these, 165 samples that had detectable cannabis metabolites were defined as the study group, and 472 samples from mothers who did not report cannabis use and from mothers who reported cannabis use but did not have measurable metabolites of cannabis in their milk samples were defined as the control group. Multivariable linear regression models were used to assess the association of presence of cannabis metabolites with protein, carbohydrates, fat, and calories in breast milk. Results: Greater protein levels (95% confidence interval [CI]: 0.112-0.376; p < 0.001) and lower fat levels (95% CI: -0.217, -0.018; p = 0.020) were found in the milk exposed to cannabis compared with reported nonexposure. The presence of cannabis was associated with an increase of 0.244 mg/dL in protein and a reduction of 11% in fats in breast milk. The levels of energy and carbohydrates were not significantly different among the two groups. Conclusions: This study demonstrated a statistically significant association between the presence of metabolites of cannabis in breast milk and protein and fat concentrations in breath milk. Further studies are required toward building the body of evidence to determine safety of cannabis use during lactation.

Objective: Breastfeeding, depending on its duration, has been suggested to benefit children's cognitive development. We aimed to examine this issue by using the Japan Environment and Children's Study, a nationwide prospective birth cohort study. Methods: We evaluated the relationship between feeding methods and cognitive development in 2- and 4-year-old children. We classified the children based on the following feeding method during the first 6 months postpartum: (1) exclusive breastfeeding group, solely breastfeeding; (2) partial breastfeeding group, solely breastfeeding for ≤5 months and combination of breastfeeding/formula for the rest of months; (3) formula-fed group, solely formula feeding for ≥4 months; and (4) others. Cognitive development was assessed by trained testers using the Kyoto Scale of Psychological Development 2001. Results: Data on 1,329 boys and 1,398 girls were analyzed. Multiple regression analysis was performed using the exclusive breastfeeding group as the reference. Boys of age 2 years in the formula-fed group had significantly lower developmental quotients (DQs) in the language-social developmental (L-S) area (partial regression coefficient [B]: -4.624, p = 0.01), whereas no significant difference was observed in those of age 4 years. Girls of age 2 and 4 years in the formula-fed group had significantly lower L-S area DQ (B: -3.637, p = 0.03 and B: -3.414, p = 0.03, respectively). In the partial breastfeeding group, no significant differences in the L-S area DQ were observed in 2- and 4-year-old boys and girls. Conclusions: Exclusive breastfeeding for the first 6 months postpartum may be more beneficial for verbal cognitive development in 4-year-old girls than solely formula feeding for ≥4 months. Furthermore, breastfeeding combined with formula for the first 6 months postpartum may not have a disadvantage on cognitive development in boys and girls of age ≥ 2 years, when compared with that observed with exclusive breastfeeding during the first 6 months postpartum.

Introduction: Dysphoric milk ejection reflex (D-MER) is a condition affecting lactating women, characterized by abrupt emotions of dysphoria that start shortly before or during milk let-down and progress for several minutes. Research on D-MER, especially with quantitative methodology, is minimal. This study aimed to validate an instrument for D-MER-related emotions, examine its prevalence and clinical features, and explore differences in maternal mental health and mother-infant bonding between mothers with and without D-MER. Methods: A total of 711 women up to 12 months postpartum participated in an online cross-sectional study. Participants fulfilled the D-MER Questionnaire (D-MERq), Edinburgh Postnatal Depression Scale, Depression, Anxiety, and Stress Scales, and the Postpartum Bonding Questionnaire. Results: The analysis showed that D-MERq had high reliability and good discriminant and divergent validity. The prevalence of D-MER was 5.9%. For the majority, D-MER manifested intensely, accompanied mostly by agitation- and anxiety-related emotions, and 45% of mothers discontinued breastfeeding due to D-MER. Mothers experiencing D-MER had higher levels of depression, anxiety, stress, previous psychiatric diagnoses, and more mother-infant bonding difficulties compared with mothers without D-MER. Conclusion: These findings demonstrate that D-MERq is a valuable tool with good psychometric properties and suitable for clinical and research use to facilitate early identification and better understanding of this phenomenon. D-MER affects a noteworthy number of women and is associated with impaired mental health, bonding difficulties, and breastfeeding discontinuation. This highlights the importance of health care providers recognizing D-MER to ensure better outcomes and a more positive breastfeeding experience.

Objective: The foreign-born population is growing in the United States, but no nationally representative statistics of breastfeeding behavior disaggregated by race/ethnicity and foreign-born status have been published in recent years. This study examines breastfeeding initiation, any breastfeeding, and exclusive breastfeeding at 3 and 6 months among foreign-born and U.S.-born Non-Hispanic (NH) Black, NH White, and Hispanic women in the United States. Methods: This is a cross-sectional study utilizing years 2021 and 2022 of the National Survey of Children's Health. Sample children identified as NH White, NH Black, and Hispanic who were 6 months to 5 years old and residing with their biological or adoptive mother were included (n = 27,818). Results: Foreign-born women in all racial/ethnic groups (NH Black, NH White, and Hispanic) had significantly higher odds of any breastfeeding at 6 months relative to U.S.-born NH White women. However, they did not have significantly different odds of exclusive breastfeeding for 6 months relative to U.S.-born NH White women. U.S.-born Hispanic women had rates of exclusive breastfeeding for 6 months (23.2%) that were much closer to U.S.-born NH Black women (23.4%) than to foreign-born Hispanic women (29.4%) or U.S.-born White women (32.1%). Conclusions: The large percentage of foreign-born women who reported some breastfeeding at 6 months indicates a strong commitment to breastfeeding and may be a leverage point for future exclusive breastfeeding interventions among this group. U.S.-born Hispanic women appear to be struggling with exclusive breastfeeding and may need additional interventions.

Background: Prematurity presents numerous barriers to mother's own milk (MOM) feeding and direct breastfeeding (DBF). Aim: This study aimed to determine factors associated with MOM feeding and DBF at discharge from the neonatal intensive care unit (NICU) in preterm-born infants presenting with feeding difficulties. Methods: A retrospective study of data from 237 preterm-born infants referred for evaluation of feeding difficulties and discharged home on full oral feeds was examined. Maternal and infant characteristics and oral feeding milestones were examined for their association with MOM intake and DBF at discharge using bivariate and multivariate regression analyses. Results: MOM feeding at discharge occurred in 35.4% (n = 84) infants. The odds of any MOM feeding at discharge were higher with higher maternal age, absence of maternal substance use, and fewer days between full per oral (PO) and discharge (all, p < 0.05). Among the 84 MOM-fed infants, 4.76% (n = 4) were exclusively breastfed, whereas 39.3% (n = 33) were partially DBF at discharge. The DBF infants had higher birthweight, no incidence of being small for gestational age, lower incidence of respiratory support at birth and intraventricular hemorrhage, lower postmenstrual age (PMA) at full PO, shorter duration from first PO to full PO, and lower PMA at discharge (all, p < 0.05). Conclusion: We found reduced use of MOM and DBF among preterm-born infants with feeding difficulties at NICU discharge. Clinical management and research advocacy must focus on targeted interventions in this setting by recognizing significant modifiable factors applicable to prepregnancy, pregnancy, NICU, and postdischarge care.

Background: Statins are historically contraindicated during breastfeeding due to theoretical concerns of disruptions in infant development from drug exposure and nutritional changes in milk. Breastfeeding mothers requiring statins often discontinue statins or postpone treatment until breastfeeding cessation, contributing to delays in treatment up to 14 years. This study aims to determine the transfer of atorvastatin and its active metabolites into human milk and evaluate the infant's risk of drug exposure. Materials and Methods: Milk samples and health information were released from the InfantRisk Human Milk Biorepository for three women taking 20 mg, 40 mg, and 80 mg of atorvastatin daily at steady state conditions. The concentration of atorvastatin (AT) and its active metabolites, ortho-hydroxy AT (2OH AT) and para-hydroxy AT (4OH AT), was quantified in timed milk samples using liquid chromatography-mass spectrometry. Results: The highest absolute infant dose of AT was 0.00027 mg/kg/day, and the highest weight-adjusted relative infant dose of the combined analytes was 0.09%, far below established thresholds for infant safety. Milk cholesterol levels were within previously established norms in the range of 10 mg/dL. The mothers reported no adverse outcomes in the two exposed infants. Conclusions: The transfer of atorvastatin and its metabolites was exceedingly low. While the impact on milk composition in states of hyperlipidemia (whether treated or untreated) is not well understood, it is unlikely that the drug in the milk would be present in clinically significant levels to adversely affect a breastfed infant.

Background: Despite the known benefits of lactation, lactating graduate medical education (GME) trainees encounter difficulties when returning to work. Wearable lactation pumps are known to be beneficial in lactating physicians, but the benefit for GME trainees in clinical care and education has not been explored. Objectives: The objective of this study was to examine the benefits of wearable lactation pumps on education and clinical care for GME trainees. Methods: In 2022-2023, all lactating GME trainees at a large academic center were invited to participate in a wearable pump pilot. Participants completed six baseline surveys with questions on lactation practices and individuals' perceptions before receiving the pump, repeated the six surveys after receiving the pump, and completed a monthly survey for 6 months after receiving the pump. A linear mixed methods model was used to compare reported experiences before and after receiving the wearable pump. Results: Twelve trainees participated in the pilot, with 10 completing pre- and post-surveys. When compared with experiences before receiving the wearable pump, there was a significant decrease in the perceived impact of lactation on clinical care (p = 0.03), medical education (p = 0.004), and missed pumping sessions (p = 0.02) after using the wearable pump. All participants who used the wearable pumps reported that it helped them to meet lactation goals. Conclusions: Wearable pumps are beneficial to trainees and may decrease the barriers to education and clinical care. GME sponsored pump programs may better support lactating trainees on their return to work.