Summary of BMI-dependent associations between maternal and syncytiotrophoblast RLNH2 and fetoplacental growth, with Uw/N subjects on the left and Ow/Ob on the right of the figure. Solid arrows show significant positive associations and dashed arrows non-significant associations. Birthweight increased as maternal plasma RLNH2 increased for Uw/N (P=0.036) but not Ow/Ob (P=0.553) subjects. However, for all subjects placental weight increased as syncytiotrophoblast RLNH2 increased (P=0.038), and syncytiotrophoblast RLNH2 (P=0.017), RXFP1 (P=0.054), and placental weight (P=0.019) all increased in Ow/Ob compared to Uw/N subjects (orange arrows).