
Doppler History • Fitzgerald & Drumm. Umbilical artery studies 1977 BMJ • Eik-Nes et al. Fetal aortic velocimetry: Dupplexscanner 1980 Lancet • Campbell et al. Utero-placental circulation: Dupplex scanner 1983 Lancet • Wladimiroff et al. MCA/UA PI ratio 1987 OG Kiserud et al. Ductus venosus velocimetry 1991 Lancet
















