Association of cord blood leptin, soluble leptin receptor, insulin-like growth factor-I and insulin-like growth factor-binding protein-1 on birth indices in healthy full-term newborns.

Background: Leptin and insulin-like growth factor-I (IGF-I) promote fetal growth. Their availability is modulated by soluble leptin receptor (SLR) and insulin-like growth factor-binding proteins (IGFBP). Studies that accounted for SLR levels when investigating the association of leptin, IGF-I and IGFBPs on birth indices are scarce.