Factors affecting early-life intestinal microbiota development.

OBJECTIVES: This paper reviews the published evidence on early-life intestinal microbiota development, as well as the different factors influencing its development before, at, and after birth. A literature search was done using PubMed, Cochrane and EMBASE databases. A growing body of evidence indicates that the intrauterine environment is not sterile as once presumed, but that maternal-fetal transmission of microbiota occurs during pregnancy. The consecutive order of bacteria with which the gastrointestinal tract is colonized will influence the outcome of community assembly and the ecological success of individual colonizers. The genetic background of the infant may also strongly influence microbial colonization of the gastrointestinal tract. The composition and development of infant gut microbiota can be influenced by many prenatal factors, such as maternal diet, obesity, smoking status, and use of antibiotic agents during pregnancy. Mode of delivery is generally accepted as a major factor determining the initial colonization. Breast milk stimulates the most balanced microbiome development for the infant, mainly because of its high content of unique oligosaccharides. Feeding is another important factor to determine intestinal colonization. Compared with breastfed infants, formula-fed infants have an increased richness of species. Initial clinical studies show that infant formulas supplemented with specific human milk oligosaccharides (HMOs) -2´-fucosyllactose alone or in combination with lacto-n-neotetraose are structurally identical to those in breast milk. HMOs increase the proportion of infants with a high bifidobacterial-dominated gut microbiota typical of that observed in breastfed infants, lead to plasma immune marker profiles similar to those of breast-fed infants and to lower morbidity and antibiotics use. Further clinical studies with the same, others or more HMOs are needed to confirm these clinical effects. A growing number of studies have reported on how the composition and development of the microbiota during early life will affect risk factors related to health up to and during adulthood. If exclusive breastfeeding is not possible, the composition of infant formula should be adapted to stimulate the development of a bifidobacterial-dominated gut microbiota typical of that observed in breastfed infants. The main components in breast milk that stimulate the growth of specific bifidobacteria are HMOs.

Preeclampsia: Long-term effects on pediatric disability.

BACKGROUND: Preeclampsia affects up to 10% of pregnancies worldwide and is one of the main causes of fetal morbidity and mortality. Although it has been linked to developmental delay, its long-term effects on neurologic development in children have yet to be sufficiently quantified. OBJECTIVES: To evaluate whether preeclampsia's severity and its obstetric management correlate to the degree of disability in these infants. MATERIALS AND METHOD: This is an observational and descriptive study performed on a population of 96 women who were diagnosed with preeclampsia at Hospital General Universitario Gregorio Marañón between 2007 and 2014, and their 111 children. To evaluate the mother, we gathered data pertaining to her medical history, renal function markers, and medical management of the preeclampsia. To assess the children, we collected fetal growth measurements, acute fetal distress markers and main diagnoses at birth. We used the Pediatric Evaluation of Disability Inventory in its computerized adaptive test version (PEDI-CAT) to study performance in the relevant areas, and the TNO-AZL Preschool children Quality of Life (TAPQOL) to estimate health-related quality of life. RESULTS: PEDI-CAT percentiles were consistently lower in the social/cognitive domain than in other areas. Lower social/cognitive percentiles were associated to both lower maternal IgG levels and presence of necrotizing enterocolitis during the neonatal period. CONCLUSIONS: A connection between preeclampsia and poor social/cognitive outcomes exists that warrants further research.

[Recommendations for the care of the healthy normal newborn at delivery and during the first postnatal hours]. / Recomendaciones para el cuidado y atención del recién nacido sano en el parto y en las primeras horas después del nacimiento.

Standardised normal newborn care at delivery and during the first hours of life is one of the objectives of the Spanish National Society of Neonatology. The object of this review is to apply the best evidence possible to the procedures of the care of the newborn from delivery and during the first moments after delivery; as well as standards and routines in care to improve quality and the safety of the newborn. A PubMed (MeSH) review using the key words: term newborn; prophylaxis of ophthalmia neonatorum; haemorrhagic disease of the newborn; neonatal jaundice; neonatal screening and hospital discharge. Concepts of regular care of the healthy newborn at delivery; normal practices in the delivery room; prophylaxis of ophthalmia neonatorum; prevention of vitamin K deficiency bleeding; care of the umbilical cord; newborn screening and hospital discharge are reviewed. The standard of care of the newborn at delivery and during the first hours of life have been updated; recommendations based on evidence and on experts of the standard committee of the spanish society of neonatology are done.