British Journal of Radiology (2003) 76, 448-451
© 2003 British Institute of Radiology
doi: 10.1259/bjr/13479830
The use of three-dimensional ultrasound for fetal gender determination in the first trimester
G D Michailidis, MD1,
P Papageorgiou, MD1,
R W Morris, PhD2 and
D L Economides, MD, FRCOG1
1 Fetal Medicine Unit, Department of Obstetrics and Gynaecology, Royal Free Hospital, Pond Street, London NW3 2QG and 2 Department of Primary Care & Population Sciences, Royal Free & University College Medical School, Rowland Hill Street, Hampstead, London NW3 2PF, UK

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Figure 1. (a) 3D reconstruction of external genitalia. (b) Sagittal and (c) axial views of the genital tubercle in a female fetus. Arrows indicate the genital tubercle.
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Figure 2. (a) 3D reconstruction of external genitalia. (b) Sagittal and (c) axial views of the genital tubercle in a male fetus.
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Figure 3. Examiners performance in predicting fetal gender at 11, 12 and 13 weeks gestation.
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Copyright © 2003 by the British Institute of Radiology.