-
Some thoughts on the true value of ultrasound.
Nicolaides KH.
Ultrasound Obstet Gynecol 2007;30:671-4. -
Gestational sac volume measured by three-dimensional ultrasound at 11 to 13 + 6 weeks of gestation: relation to chromosomal defects.
Falcon O, Wegrzyn P, Faro C, Peralta CF, Nicolaides KH.
Ultrasound Obstet Gynecol 2005;25:546-50.