Leptin receptor gene expression in the utero-placental and uterine compartments during pregnancy. Leptin receptor gene expression during pregnancy in the utero-placental compartments (Ut/Pl) (A), and in the pre-implantation uterus and inter-placental uterine sections (Ut) (B). RGE: relative gene expression. Bars and whiskers present the geometric mean and the deviation factor. Bars with different superscripts differ at P < 0.001 (Ut/Pl) and at P ≤ 0.019 (Ut).