Hawkes CP, et al. - The researchers used a liquid chromatography/mass spectrometry (LCMS) assay to examine the association of insulin-like growth factor (IGF)-I and -II concentrations at birth with neonatal anthropometry. They demonstrated that anthropometric parameters at birth were correlated with IGF-I and weakly with IGF-II concentrations using an LCMS assay. This indicated that IGF-I was the more important growth factor for regulating infant growth at the time of birth.