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The INTERGROWTH-21st Project is a multi-centre, multi-ethnic, population-based project, conducted between 2009 and 2014, in eight demarcated urban areas: Pelotas, Brazil; Shunyi County, Beijing, China; Central Nagpur, India; Turin, Italy; Parklands Suburb, Nairobi, Kenya; Muscat, Oman; Oxford, UK, and Seattle, USA. Its primary aim was to study growth, health, nutrition and neuro-development from less than 14 weeks of gestation to 2 years of age, using the same conceptual framework as the WHO Multicentre Growth Reference Study, so as to produce international prescriptive standards for pregnancy dating, maternal weight gain, fetal growth, newborn size, the postnatal growth of preterm infants and cognitive development at 2 years of age. These scientifically robust clinical tools may be used to monitor and evaluate maternal and fetal well-being, as well as infant health and nutrition at an individual and population level.


The intergrowth package is in active development and is not yet on CRAN.

You can install the development version from GitHub with:

if(!require(remotes)) install.packages("remotes")

What does intergrowth do?

The intergrowth package provides functions to calculate various anthropometric indices for very young children (from less than 14 weeks up to 2 years old) based on calculations prescribed by the INTERGROWTH-21st Project.


If you find the intergrowth package useful, please cite using the suggested citation provided by a call to the citation function as follows:

#> To cite intergrowth in publications use:
#>   Ernest Guevarra (2023). intergrowth: An R Implementation of the
#>   INTERGROWTH-21st Standards and Tools R package version URL
#> DOI 10.5281/zenodo.7504870
#> A BibTeX entry for LaTeX users is
#>   @Manual{,
#>     title = {intergrowth: An R Implementation of the INTERGROWTH-21st Standards and Tools},
#>     author = {{Ernest Guevarra}},
#>     year = {2023},
#>     note = {R package version},
#>     url = {},
#>     doi = {10.5281/zenodo.7504870},
#>   }

Community guidelines

Feedback, bug reports, and feature requests are welcome; file issues or seek support here. If you would like to contribute to the package, please see our contributing guidelines.

This project is released with a Contributor Code of Conduct. By contributing to this project, you agree to abide by its terms.