A list of coefficients from the INTERGROWTH birth standard.
International standards for newborn weight, length, and head circumference by gestational age and sex: the Newborn Cross-Sectional Study of the INTERGROWTH-21st Project Villar, José et al. The Lancet, Volume 384, Issue 9946, 857-868
head(ig_coefs$hcircm$Female)
#> ga mu sigma nu tau
#> 1 231 30.38709 1.310714 1.045915 20.97268
#> 2 232 30.47791 1.303260 1.045915 20.97268
#> 3 233 30.56873 1.295806 1.045915 20.97268
#> 4 234 30.65829 1.288488 1.045915 20.97268
#> 5 235 30.74660 1.281304 1.045915 20.97268
#> 6 236 30.83370 1.274251 1.045915 20.97268