Figure 1. Examples of KID1 to KID 5 embryos from Örebro Fertility Clinic, with corresponding bar showing time-lapse annotation. KID1 embryos have a too fast start up to three cells. KID2 embryos have too slow initial development. KID3 embryos have irregular divisions with increasing development speed between the two and five-cell stages. KID4 embryos also have irregular divisions but with decreasing development speed between the two and five-cell stages, or, have not reached eight cells prior to 66 hours post insemination. KID5 embryos have passed all avoidance criteria. The perfect embryo should spend as little time as possible in yellow zones representing uneven cell numbers, and develop in a timely manner from one cell to two cells, from two cells to four cells, and so on. These embryos show that morphology is separate from morphokinetics. In each KID class, there are embryos with the potential to develop into clinically usable blastocysts that appear to be of high quality to the embryologist using standard morphology as embryo evaluation tool.