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Fulltext Mother And late Preterm Lactation Study (MAPLeS): a randomised controlled trial testing the use of a breastfeeding meditation by mothers of late preterm infants on maternal psychological state, breast milk composition and volume, and infant behaviour and growth

Dib S, Wells JCK, Fewtrell M

Trials, 2020 Apr 07;21(1):318.
PMID: 32264947 DOI: 10.1186/s13063-020-4225-3

BACKGROUND: Late preterm infants suffer from more complications and are less likely to be breastfed compared to term infants and their mothers experience higher levels of stress than mothers with term infants. The physiological or hormonal responses that influence milk ejection, milk production, and/or maternal behaviour are possible mechanisms by which maternal distress could negatively influence breastfeeding success. Maternal mood might also affect infant behaviour (feeding, sleeping, and crying) through changes in milk volume and composition, and consequently breastfeeding success and infant growth. Previous research, using relaxation therapy in 64 Malaysian first-time mothers breastfeeding their full-term infants, demonstrated that the therapy was effective in reducing maternal stress and improving infant growth. We hypothesise that expected benefits are even greater in a more vulnerable population where additional breastfeeding support is especially needed, such as in mothers of late preterm infants.
METHODS/DESIGN: This protocol describes our randomised controlled trial that tests whether a breastfeeding meditation audio reduces maternal stress in mothers of late preterm infants in London. Home visits will be conducted at 2-3 and 6-8 weeks post-delivery. Participants will be randomised to a control group or an intervention group, where mothers will be asked to listen to a meditation tape on a daily basis while breastfeeding. The main outcomes of the intervention will be maternal stress markers and infant weight Z-score. Potential mediators will be the secondary outcomes and include breast milk macronutrient and hormone levels (ghrelin, leptin, cortisol, and adiponectin), milk volume assessed by 48-h test-weighing, and maternal engagement with the infant. Infant behaviour, including crying and sleeping, and infant appetite will be evaluated. Data about other mediators such as maternal perception of milk supply and salivary oxytocin will be collected.
DISCUSSION: We hypothesise that the use of the breastfeeding meditation will reduce maternal stress and consequently improve infant growth mediated by changes in milk composition and volume and maternal behaviour. This study will allow us to understand the mother-infant factors that influence breastfeeding in late preterm infants and potentially identify a method that could improve mother, infant, and breastfeeding outcomes.
TRIAL REGISTRATION: ClinicalTrials.gov, NCT03791749. Registered 1 January 2019.
Differences in maternal characteristics and their associations with breastfeeding attitudes among primiparous mothers

Mohd Shukri NH, Wells J, Fewtrell M

Midwifery, 2021 Apr;95:102931.
PMID: 33540157 DOI: 10.1016/j.midw.2021.102931

BACKGROUND: The benefits of breastfeeding are well documented, yet substantially below half of all mothers globally meet the recommendation to exclusively breast-feed for 6 months.
OBJECTIVE: This study aimed to examine whether there were differences in maternal factors, including maternal characteristics and breastfeeding attitudes, between those who were eligible versus non-eligible to be included in a randomised trial, as exclusive breastfeeding was the eligibility criteria for the trial. It also aimed to investigate associations between maternal factors and breastfeeding attitudes.
METHOD: Primiparous pregnant mothers (n=88) completed questionnaires on demographic factors including maternity care and breastfeeding attitude using self-administered questionnaire and Iowa Infant Feeding Attitude Scale (IIFAS). Two weeks post-birth, mothers were screened for eligibility to be included in a randomised trial including assessing for exclusive breastfeeding (EBF). Findings were compared between inclusion (all EBF mothers) and exclusion groups (non-EBF).
RESULTS: Inclusion group mothers were significantly younger than those in the exclusion group (26.7±2.8 v 28.5±2.5, p=0.007) and the majority had their husband as the primary maternity care person after birth (X2=12.8, p=0.01). Inclusion group mothers had a more positive perception toward breastfeeding in public and at work on the IIFAS scale (p<0.05). The overall IIFAS score was positively associated with higher breastfeeding confidence (r=0.285, p=0.008), education levels (r=0.31, p=0.003), household income (r=0.32, p=0.003), and age (r=0.28, p=0.008).
CONCLUSION: EBF mothers (inclusion group) tend to be younger, had husband as primary care, and have more positive perception towards breastfeeding outside home. Overall, maternal characteristics and paternal support could influence breastfeeding practices and should be targeted for future intervention. Maternal attitude and perceptions about breastfeeding in public could be improved to encourage exclusive breastfeeding.
Fulltext The effectiveness of interventions using relaxation therapy to improve breastfeeding outcomes: A systematic review

Mohd Shukri NH, Wells JCK, Fewtrell M

Matern Child Nutr, 2018 04;14(2):e12563.
PMID: 29105966 DOI: 10.1111/mcn.12563

Maternal psychological state is recognised to influence lactation success, largely by affecting milk ejection. Thus, increased psychological distress can disrupt milk flow and in the long-term, affect milk synthesis. Conversely, it is possible that milk ejection could be improved by using relaxation therapy during breastfeeding. We performed a systematic review to evaluate the effectiveness of interventions using relaxation therapy to improve breastfeeding outcomes and to assess the consequent impact(s) on infant growth and behaviour. A literature search was performed using the PRISMA guidelines where we included intervention studies (including nonrandomised controlled studies) using relaxation therapy in breastfeeding mothers during the post-natal period. Out of 147 identified records at the initial search, 5 studies were eligible, of which 3 were randomised controlled trials and 2 were nonrandomised or quasi-experimental studies. These studies were conducted in Europe, America, and India and included 311 mother-infant pairs, of which 64 infants were full-term and 247 were premature infants. Relaxation therapy was shown to increase milk yield in mothers of preterm infants in 2 randomised trials, however, the milk sampling protocol for these studies could be questioned. None of the studies investigated the consequent effects on infant outcomes. Overall, limited evidence was found on the effectiveness of relaxation therapy on breast milk composition and infant outcomes. Experimental studies with better standardisation of protocol and robust methodological design are needed to investigate the effectiveness of relaxation therapy on both breastfeeding and infant growth and behavioural outcomes.
Fulltext Study protocol: An investigation of mother-infant signalling during breastfeeding using a randomised trial to test the effectiveness of breastfeeding relaxation therapy on maternal psychological state, breast milk production and infant behaviour and growth

Shukri NHM, Wells J, Mukhtar F, Lee MHS, Fewtrell M

Int Breastfeed J, 2017;12:33.
PMID: 28725257 DOI: 10.1186/s13006-017-0124-y

BACKGROUND: The physiological and psychological signalling between mother and infant during lactation is one of the prominent mother-infant factors that may influence breastfeeding outcomes. The infant can 'signal' his needs through vocalisation, and the mother can respond by allowing or restricting nipple access, which might alter the breast milk composition or volume. This may lead to parent-offspring conflict during the lactation period. Challenging infant behaviour has also been associated with maternal psychological distress, which might affect breastfeeding performance. Most attempts to improve breastfeeding rates focus on providing additional support, yet many aspects of the breastfeeding process are poorly understood. Thus, our objective is to investigate mother-infant signalling during breastfeeding by manipulating maternal psychological state using a relaxation therapy intervention. The study will test the hypothesis that mothers who listen to the therapy will be more relaxed/less stressed and this will favourably alter breast milk composition and/or affect milk volume and hence influence infant outcomes.
METHODS: A randomised controlled trial will be conducted in first-time breastfeeding mothers and their new-born infants. Pregnant mothers will be recruited at antenatal clinics in Selangor, Malaysia, and four home visits will be carried out at 2, 6, 12 and 14 weeks postnatally. Participants will be randomised into a control and an intervention group in the early post-partum period. Mothers from the intervention group will be asked to listen daily to an audio recording with relaxation therapy during breastfeeding. Maternal psychological state, breastfeeding practices and infant behaviour will be assessed using validated questionnaires. Milk volume will be measured using stable isotopes. Breast milk samples will be collected to measure macronutrient content and hormone levels. Anthropometric measurements (weight, length and head circumference) will be performed during all home visits, including body composition at week 14.
DISCUSSION: The main outcomes will be the effect of the intervention on maternal psychological state, milk production, cortisol levels, and infant behaviour and growth. Secondary outcomes will be associations between breast milk composition and infant appetite and growth. This study aims to provide a greater understanding of maternal-infant factors which influence breastfeeding outcomes and which may be useful targets for future interventions.
TRIAL REGISTRATION: ClinicalTrials.gov identifier: NCT01971216.
Randomized controlled trial investigating the effects of a breastfeeding relaxation intervention on maternal psychological state, breast milk outcomes, and infant behavior and growth

Mohd Shukri NH, Wells J, Eaton S, Mukhtar F, Petelin A, Jenko-Pražnikar Z, et al.

Am J Clin Nutr, 2019 07 01;110(1):121-130.
PMID: 31161202 DOI: 10.1093/ajcn/nqz033

BACKGROUND: Biological signaling and communication between mothers and infants during breastfeeding may shape infant behavior and feeding. This signaling is complex and little explored in humans, although it is potentially relevant for initiatives to improve breastfeeding rates.
OBJECTIVES: The aim of this study was to investigate physiological and psychological aspects of mother-infant signaling during breastfeeding experimentally, testing the effects of a relaxation intervention on maternal psychological state, breast milk intake, milk cortisol levels, and infant behavior and growth.
METHODS: Primiparous breastfeeding mothers and full-term infants were randomly assigned to receive relaxation therapy [intervention relaxation group; n = 33 (RG)] or to the control group [n = 31 (CG); no relaxation therapy] at 2 wk postpartum. Both groups received standard breastfeeding support. Home visits were conducted at 2 (HV1), 6 (HV2), 12 (HV3) and 14 (HV4) wk to measure maternal stress and anxiety, breast milk intake and milk cortisol, and infant behavior and growth.
RESULTS: RG mothers had lower stress scores postintervention than the CG (HV3 ∆ = -3.13; 95% CI: -5.9, -0.3) and lower hindmilk cortisol at HV1 (∆ = -44.5%; 95% CI: -76.1%, -12.9%) but not at HV2. RG infants had longer sleep duration (∆ = 82 min/d; 95% CI: 16, 149 min/d) at HV2 and higher gains in weight and body mass index standardized deviation score than the CG infants (∆ = 0.76; 95% CI: 0.3, 1.22; and ∆ = 0.59; 95% CI: 0.09, 1.1, respectively). RG infants had a mean milk intake at HV3 that was 227 g/d higher than that of the CG infants (P = 0.031) after controlling for gender and milk intake at HV1.
CONCLUSIONS: The trial shows the effectiveness of a simple relaxation intervention for improving maternal and infant outcomes and identifies some potential signaling mechanisms for investigation in future and larger studies, especially in settings where mothers are more stressed, such as those with preterm or low birth weight infants. This trial was registered at clinicaltrials.gov as NCT01971216.