* Department of Obstetrics and Gynecology, AUSL 6.  ( Palermo ) Italy

** France

These are images found by Dr. Labate and Manson (their origine is unknow). All images are static images, but they give the impression of motion.

I posted those since I think that this is important to recognize that we do perceive motion occaionally when there is none (and of course this matters in the visual recognition of small embryo heart beat).