Although [the morphological sorting] usually takes a few hours, there is no need to get up so early. Contrary to popular belief among patients, fertilization is not performed immediately after OPU. In fact, both eggs and sperm can wait for several hours in the lab, without decline in their potential. Therefore, if sperm is brought to the laboratory at around 8:00am, the sorting will probably end at around 12:00pm, and the eggs will wait no longer than 3 hours.