INTERGROWTH21st
INTERGROWTH-21st is a multinational research project established to develop international, prescriptive standards for fetal growth, newborn size, and early postnatal growth. Initiated in the 2010s with support from the World Health Organization and a consortium of researchers, the project sought to create universal references that reflect optimal growth under healthy conditions and are applicable across populations and health systems.
Its methodology involved prospective cohorts across multiple sites using standardized protocols for dating pregnancies, performing ultrasound
Key outputs were published in The Lancet in 2014, presenting international standards for fetal size and for
Impact and usage: since publication, the standards have influenced practice guidelines and research on perinatal growth,