The International Fetal and Newborn Growth Consortium for the 21st Century, or INTERGROWTH-21st,, is a global, multidisciplinary network of more than 300 researchers and clinicians from 27 institutions in 18 countries worldwide and coordinated from the University of Oxford, dedicated to improving perinatal health.

 There are various modular courses on fetal and newborn growth monitoring and the application of the INTERGROWTH-21st international growth standards, so that clinicians and researchers can make judgements about appropriateness of growth.  There are materials on preterm infant feeding and growth monitoring: Implementation of the INTERGROWTH-21st protocol: The INTERPRACTICE-21st Project, which promotes the optimal postnatal growth of preterm infants and standardises growth measurement in selected populations around the world.

It is based on the implementation of the INTERGROWTH-21st international standards for preterm postnatal growth and evidence-based feeding recommendations based on human milk