In this presentation Dr. Csaba Pribenszky, one of the inventors of Primo Vision, explains why using time lapse in the IVF-lab is inevitable. He talks about time-lapse in general and about the development and advantages with the Primo Vision time-lapse embryo monitoring system. The presentation was held in the Vitrolife booth during the annual ESHRE meeting (European Society of Human Reproduction and Embryology) 2013 in London.