insulin, insulin-like growth factors, IGF, IGF-I, IGF-II, diabetes, diabetic, placentae, placenta, pregnancy, cell cultures, hyperinsulinemia, fetal hyperinsulinism, hyperplacentation, fetal macrosomia, trophoblastic morphofunctional pathology, maternai hyperglycemia, immunocytochemical markers, cytotrophoblast, trophoblast