Virtual reality for embryonic measurements requiring depth perception Melek Rousian, M.Sc., Anton H.J. Koning, Ph.D., Peter J. van der Spek, Ph.D., Eric A.P. Steegers, M.D., Ph.D., Niek Exalto, M.D., Ph.D.  Fertility and Sterility  Volume 95, Issue 2, Pages 773-774 (February 2011) DOI: 10.1016/j.fertnstert.2010.12.032 Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

Figure 1 (Left) Embryo of 8+6 weeks’ gestational age (GA) visualized in the I-Space VR application. The observer wears stereoscopic glasses and interacts with the displayed ‘hologram’ by means of a joystick. (Right) The embryo (A), amniotic sac (B), yolk sac (C) umbilical cord (D), vitelline duct (E), limbs (F) are clearly visualized. The crown-rump length (CRL) of this embryo is 23.8 mm. The umbilical cord length and vitelline duct length are traced in green. The umbilical cord length is 21.4 mm and the vitelline duct length is 27.1 mm. Note this two-dimensional picture cannot express the three-dimensionality of the original hologram. Fertility and Sterility 2011 95, 773-774DOI: (10.1016/j.fertnstert.2010.12.032) Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

Figure 2 Early fetus of 10+3 weeks’ GA and a CRL of 37.5 mm as rendered by V-Scope. The umbilical cord (A) is traced, and the length is 53.2 mm. The length of the arm (B) is 16.8 mm and the length of the leg (C) is 19.6 mm. The amniotic sac (D) and yolk sac (E) are visualized. Fertility and Sterility 2011 95, 773-774DOI: (10.1016/j.fertnstert.2010.12.032) Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions