title: Reply.
authors.affiliation: Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, London, UK.|Institute for Reproductive and Developmental Biology, Imperial College London, London, UK.
authors.forename: T
authors.initials: T
authors.lastname: Prior
authors.affiliation: Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, London, UK.|Institute for Reproductive and Developmental Biology, Imperial College London, London, UK.|Mater Research Institute/University of Queensland, South Brisbane, Queensland, Australia.
authors.forename: S
authors.initials: S
authors.lastname: Kumar
mesh_terms: D005260:Female; D005317:Fetal Growth Retardation / Q000473:pathology*; D005333:Fetus / Q000033:anatomy & histology* / Q000473:pathology*; D006801:Humans; D036801:Parturition / Q000502:physiology*; D011247:Pregnancy; D018617:Ultrasonography, Doppler, Pulsed / Q000379:methods*; D016216:Ultrasonography, Prenatal / Q000379:methods*