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Preterm infants have increased nutrient requirements to achieve the growth velocity of a child growing in its mother’s womb4,5. These requirements are much higher than those of a term born peer4-6. Medical associations such as the European Society for Gastroenterology, Hepatology, and Nutrition (ESPGHAN)6 and American Academy of Pediatrics (AAP)7 as well as neonatal experts⁸ address these requirements by giving specific recommendations for premature infants born weighing less than 1000g, less than 1500g and less than 1800g. All these associations acknowledge that protein is a key nutrient in avoiding growth failure as long as enough energy is provided6-8.
In support of optimal growth and development, preterm nutrition should address:
In line with the World Health Organisation (WHO) we believe that human milk is the best nutrition for preterm infants9. Breastfeeding and human milk (HM) are the preferred feeding mode and nutrition for every infant10-13.
The composition of HM is highly variable and tailored to the personal nutritional needs of an infant14-16. For preterm infants on parenteral feeds, trophic feeding with HM soon after birth is recommended to prepare the intestine for enteral feeding3,11,12.
Beyond the benefits of breastfeeding known for term infants17, providing HM to premature infants:
Colostrum, a pre-milk fluid rich in immunoglobulins and immune cells that is produced during the first 24–48 hours postpartum, is especially important for immune protection and gut maturation and should never be discarded12.
If own mothers milk (OMM) is not available donor human milk (DHM) from milk banks is the next preferred alternative for preterm infant feeding13. However, as with OMM, DHM is not nutrient enriched enough to meet the high requirements of extreme and very premature infants and fortification i.e. adding macro- and micronutrients to HM or a multicomponent Human Milk Fortifier (HMF) is required6,8,18.
HM fortification is associated with improved growth and brain development3,6,8,10-13,18. Infants born weighing less than 1800g are recommended to receive fortified HM enriched in energy, macronutrients, minerals, and vitamins6,8 to achieve growth rates similar to those of the fetus. However, infants born weighing less than 1000 g and/or those born small-for-gestational age may need an even faster weight gain for recovering growth19,20 and have therefore even higher protein and energy needs6,8,18,19.
Human milk is the preferred nutrition for preterm infants. However, fortification is recommended for preterm infants <1800g to ensure the required nutrients are received alongside all HM associated benefits for healthy growth and development.
Avoiding growth failure by meeting the high energy and protein needs is challenging: enteral feeding commonly takes place through naso-gastric tubes because of feeding difficulties4. The feed needs to be highly concentrated because of small stomach volumes that limit intake, but also well tolerated4-6.
An immature gut physiology affects growth. Healthy growth can only be achieved with an intact healthy gut that is capable of digesting and absorbing the provided nutrients, and a metabolism prepared to use nutrients effectively4.
The colonic microbiota, compromised in preterm infants because of prophylactic use of antibiotics and pathogens in the hospital environment, play an important role in maintaining a healthy gastrointestinal environment for digestion of nutrients21,22.
Intestinal microbiota also plays a vital role in the immune system21, helping to reduce the risk of infection and necrotising enterocolitis, which compromise survival and/ or growth22.
As such, providing appropriate nutrition to meet the high nutrient and energy requirements and support the colonisation of healthy intestinal microbiota is essential to improve gut and immune health, which provides the platform for adequate growth. Together, these factors create an environment for long term health.
Adequate growth is a major challenge for preterm infants. It is affected by an immature gut and metabolic physiology and as a consequence inadequate intake, digestion, uptake and usage of the nutrients. Moreover suboptimal intestinal microbiota and an immature immune system may play a role in the risk of infection and necrotising enterocolitis, further compromising growth. Together the factors/processes leading to growth failure also impact/ compromise brain development.
Nutricia has over 40 years of breast milk expertise with a dedicated team of around 250 specialist scientists collaborating with hospitals, laboratories and universities worldwide to ensure we’re leaders in this field. At Nutricia, science is at the heart of our nutrition and health commitment to help healthcare professionals support parents during the first 1,000 days. Our research and innovation delivers evidence-based nutritional solutions to support a child’s lifelong health, combining our Early Life Nutrition expertise with years of professional experience to develop a portfolio of products to support the nutritional needs of mums, mums-to-be and their babies.