- The relationship between transplacental O2 diffusion and placental expression of PlGF, VEGF and their receptors in a placental insufficiency model of fetal growth restriction. Regnault, T.R., de Vrijer, B., Galan, H.L., Davidsen, M.L., Trembler, K.A., Battaglia, F.C., Wilkening, R.B., Anthony, R.V. J. Physiol. (Lond.) (2003)