title: Do we need to restrict the use of Doppler ultrasound in the first trimester of pregnancy?
authors: Joint Department of Physics, Division of Radiotherapy and Imaging, Institute of Cancer Research, Royal Marsden Hospital, Sutton, Surrey, UK. gail.terhaar@icr.ac.uk
authors: Gail R
authors: GR
authors: ter Haar
authors: Jacques S
authors: JS
authors: Abramowicz
authors: Iwaki
authors: I
authors: Akiyama
authors: David H
authors: DH
authors: Evans
authors: Marvin C
authors: MC
authors: Ziskin
authors: Karel
authors: K
authors: Maršál
mesh_terms: D000818:Animals; D001927:Brain Diseases / Q000209:etiology*; D002642:Chick Embryo; D004195:Disease Models, Animal; D005260:Female; D006801:Humans; D051379:Mice; D017410:Practice Guidelines as Topic; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D051381:Rats; D018608:Ultrasonography, Doppler / Q000009:adverse effects* / Q000379:methods*; D016216:Ultrasonography, Prenatal / Q000009:adverse effects* / Q000379:methods*