PRB/NICHD African-American Customized Fetal Growth Standard

To use the PRB/NICHD customized fetal weight chart accompanying the manuscript:
A new customized fetal growth standard for African American women: the PRB/NICHD Detroit study. Tarca AL, Romero R, Gudicha DW, Erez O, Hernandez-Andrade E, Yeo L, Bhatti G, Pacora P, Maymon E, Hassan SS. AJOG, 2018;218(2S):S679-S691.e4. PubMed PMID: 29422207.

you can use one of the two options:

  • Use the online calculator from here
  • Download the Microsoft Excel centile calculator from here: DetroitChart_V.1.0
  • Download the R package implementing a bulk centile calculator from here: PRBGrowthChart

To install, load and use the PRBGrowthChart package, use these commands:

>install.packages(“PRBGrowthChart_0.2.0.tar.gz”,repos = NULL, type = “source”)


For help on how to use the function type:


A typical R session is shown below: