Risk of early breastfeeding cessation among symmetrical, small for gestational age infants

25 Years of Research in Human Lactation: From Discovery to Translation

Researchers have recently called for human lactation research to be conceptualized as a biological framework where maternal and infant factors impacting human milk, in terms of composition, volume and energy content are studied along with relationships to infant growth, development and health. This approach allows for the development of evidence-based interventions that are more likely to support breastfeeding and lactation in pursuit of global breastfeeding goals. Here we summarize the seminal findings of our research programme using a biological systems approach traversing breast anatomy, milk secretion, physiology of milk removal with respect to breastfeeding and expression, milk composition and infant intake, and infant gastric emptying, culminating in the exploration of relationships with infant growth, development of body composition, and health. This approach has allowed the translation of the findings with respect to education, and clinical practice. It also sets a foundation for improved study design for future investigations in human lactation.

Impact of in-hospital birth weight loss on short and medium term breastfeeding outcomes

Background

The definition for lower limit of safe birthweight loss among exclusively breastfed neonates is arbitrary. Despite this, in cases of great in-hospital weight loss, breastfeeding adequacy is immediately questioned. The aim of this study was to examine the relationship between weight loss at discharge from hospital, when babies are ready to go home, and eventual cessation of exclusive breastfeeding since birth.

Methods

This is a secondary analysis of a cohort study. Study participants were 788 full term, breastfed and stable babies, born in 2007–2012 consecutively enrolled to primary care pediatric clinics in Majorca, Spain. Data were collected by chart review. The main predictor was birthweight loss at discharge. Extreme weight loss was defined as the 90th and 95th centiles of birthweight loss for babies who were delivered by vaginal delivery and by cesarean section. Main outcomes were cessation of exclusive breastfeeding by 7, 15, 30 and 100 days of life. Multivariate regression analysis was performed to study the relationship of selected variables with exclusive breastfeeding cessation since birth.

Results

We observed a median weight loss of 6%. In bivariate analysis, quartiles of birthweight loss at discharge were predictive of exclusive breastfeeding cessation at 15, 30 and 100 days postpartum. In multivariate analysis: in-hospital weight loss above the median did predict exclusive breastfeeding cessation by 15, 30 and 100 days of life, Adjusted Odds Ratios (AORs) (95% Confidence Intervals [CIs]): 1.57 (1.12, 2.19), 1.73 (1.26, 2.38) and 1.69 (1.25, 2.29), respectively. In contrast, we did not find that newborn extreme weight losses were associated with exclusive breastfeeding cessation.

Conclusions

We report that extreme birthweight loss does not trigger immediate formula supplementation. We do not identify any cut-off values to be used as predictors for the initiation of supplementary feeding, this research question remains unanswered.

The Effects of Mild Gestational Hyperglycemia on Exclusive Breastfeeding Cessation

Gestational diabetes increases the risk of a range of adverse perinatal outcomes, including breastfeeding failure, but the best cut-off point for gestational diabetes is unknown. The purpose of this study was to evaluate the association between mild gestational glucose tolerance impairment and the early cessation of exclusive breastfeeding (EBF). This is an observational study of 768 women with full term pregnancies that were screened for gestational diabetes at 24–28 weeks gestation. Subjects were divided into two groups: those with a normal 1-h glucose challenge test and those with an elevated 1-h glucose challenge test but still did not qualify for gestational diabetes. We constructed multivariable logistic regression models using data from 616 women with normal gestational glucose tolerance and 152 women with an isolated positive 1-h glucose challenge test. The risk of early exclusive breastfeeding cessation was found to increase in women with mildly impaired glucose tolerance during pregnancy (adjusted OR, 1.65; 95% CI: 1.11, 2.45). Risks of early EBF cessation were also independently associated with the amount of neonatal weight loss and admission to the neonatal ward. Instead, parity was associated with a decreased risk for shorter EBF duration. Insulin resistance—even in the absence of gestational diabetes mellitus—may be an impeding factor for EBF.

Paternal and Maternal Testosterone in Parents of NICU Infants Transitioning Home

Lower testosterone during the transition to new parenthood is considered beneficial to help parents better engage with their infants. No data currently exist studying salivary testosterone of parents with infants in neonatal intensive care units (NICUs) during the transition to home. We examine testosterone levels for parents of very low-birth-weight infants, including links between salivary testosterone and infant factors (such as breast-feeding), psychosocial stress, and changes over time.Testosterone salivary samples were assayed after self-collection by 86 parents (43 fathers and 43 mothers) with NICU infants at wakeup and bedtime prior to discharge and at 3 additional times at home. Self-reported survey measures, including psychosocial reports, were also collected at these times.Using multilevel modeling approaches, we report significant associations between paternal testosterone by time and psychosocial adjustment and between both paternal and maternal testosterone and infant feeding mode (P < .05). Results were significant after accounting for covariates. Our study is the first to examine the time course of diurnal testosterone for parents of premature infants over the transition home; as such, we suggest further research into better understanding parental physiology in this vulnerable parent population.

Risk Factors for Discontinuation of Exclusive Breastfeeding by One Month of Postnatal Age Among High Risk Newborns: An Institution Based Case Control Study

BACKGROUND

Beyond one month of age, there is generally a drop in the proportion of mothers providing exclusive breastfeeding to their infants. Infants with morbidities during neonatal period have been observed to be at higher risk of discontinuation.

OBJECTIVE

To enumerate the prevalent factors behind discontinuation of breastfeeding among high risk newborns by first month of life.

MATERIALS AND METHODS

A case control study conducted at high risk newborn followup clinic of a teaching medical institute in northern India between January and May 2013. Infants were divided on the basis of continuation (controls) or discontinuation (cases) of exclusive breastfeeding at one month of age. The socio-demographic factors along with maternal and neonatal medical factors were compared among groups.

RESULTS

During the study period, 112 newborns were screened. Forty seven cases and thirty eight controls were enrolled and finally evaluated. Female gender of newborn, less educated mothers and large families were observed to be associated with discontinuation of exclusive breastfeeding during first month of life among high risk newborns. Requirement of parenteral fluids during hospital stay emerged as the only independent medical reason.

CONCLUSION

As in healthy newborns, the socio-cultural factors overshadow the medical reasons for discontinuation of exclusive breastfeeding during first month of life among high risk newborns.

Metabolic syndrome in Spanish adolescents and its association with birth weight, breastfeeding duration, maternal smoking, and maternal obesity: a cross-sectional study

PURPOSE

The metabolic syndrome (MetS) in adolescents is a growing problem. The objectives were to verify the association among early predictors such as birth weight, breastfeeding, maternal weight status, smoking during pregnancy, and the development of MetS.

METHODS

A cross-sectional study was performed of 976 children and adolescents, 10-15 years of age, at schools in the provinces of Granada and Almeria (Spain). For this purpose, we analyzed the physical characteristics as well as the biochemical markers of the participants with a view to ascertaining the prevalence of the MetS. Relevant data were also extracted from the clinical histories of their mothers.

RESULTS

It was found that 3.85% of the female subjects and 5.38% of the male subjects in the sample population suffered from MetS. In both sexes, there was an association between birth weight and positive MetS diagnosis (OR 1.27). For both males and females, there was an inverse association between the length of time that they had been breastfed and positive MetS diagnosis (OR1-3 months 3.16; OR4-6 months 1.70; OR(>6 months) 0.13). There was also a significant association between maternal weight (OR(overweight )30.79; OR(obesity) 49.36) and cigarette consumption during pregnancy (OR 1.47) and the subsequent development of MetS in the children of these mothers.

CONCLUSIONS

Those subjects born with a higher than average birth weight had a greater risk of developing MetS in childhood and adolescence. Breastfeeding children for longer than 6 months protected them from MetS in their early years as well as in their teens. Other risk factors for MetS were maternal smoking during pregnancy as well as maternal overweight and obesity.