Virtual reality for embryonic measurements requiring depth perception

Two real-time three-dimensional images of first-trimester pregnancies visualized using virtual reality (VR) are presented. Inherently three-dimensional structures, like the umbilical cord and limbs, can be efficiently and accurately measured using VR. (Fertil Steril(R) 2011;95:773-4. (C) 2011 by American Society for Reproductive Medicine.)