A list of coefficients from the INTERGROWTH very preterm birth standard.
https://intergrowth21.tghn.org
INTERGROWTH-21st very preterm size at birth reference charts. Lancet 2016 doi.org/10.1016/S0140-6736(16) 00384-6. Villar, José et al.
ig_early_coefs$hcircm$Female#> NULL