First trimester ultrasonographic diagnosis of fetal structural abnormalities in a low risk population
Economides DL, Braithwaite JM. First trimester ultrasonographic diagnosis of fetal structural abnormalities in a low risk population. Br J Obstet Gynaecol 1998;105:53-7.
UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10-14 weeks of gestation. Fetal Medicine Foundation First Trimester Screening Group
Snijders RJ, Noble P, Sebire N, Souka A, Nicolaides KH. UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10-14 weeks of gestation. Fetal Medicine Foundation First Trimester Screening Group. Lancet 1998;352:343-6.
The sonographic identification of fetal gender from 11 to 14 weeks of gestation
Whitlow BJ, Lazanakis MS, Economides DL. The sonographic identification of fetal gender from 11 to 14 weeks of gestation. Ultrasound Obstet Gynecol 1999;13:301-4.
Early determination of fetal sex using transvaginal sonography: Technique and pitfalls
Bronshtein M, Rottem S, Yoffe N, Blumenfeld Z, Brandes JM. Early determination of fetal sex using transvaginal sonography: Technique and pitfalls. J Clin Ultrasound 1990;18:302-6.
Assessment of fetal anatomy at 12 to 13 weeks of gestation by transabdominal and transvaginal sonography
Braithwaite JM, Armstrong MA, Economides DL. Assessment of fetal anatomy at 12 to 13 weeks of gestation by transabdominal and transvaginal sonography. Br J Obstet Gynaecol 1996;103:82-5.
Assessment of fetal anatomy in the first trimester using two- and three-dimensional ultrasound
Michailidis GD, Papageorgiou P, Economides DL. Assessment of fetal anatomy in the first trimester using two- and three-dimensional ultrasound. Br J Radiol 2002;75:215-9.