In contrast, on d0.5 of gestation, iron deficiency did not change the relative quantities of the mRNA coding for L‐CPT‐1, a regulator of fatty acid oxidation, whereas by d21.5 of gestation, it was reduced by approximately 30% in the livers of dams fed the Fe‐deficient diet compared to the control (P = 0.023 by one‐way ANOVA). This evidence concerns the gene CPT1A and nutritional disorder.