Reseach progress of time-lapse monitoring system

Time-lapse monitoring technology has been widely used in human assisted reproductive technology (ART), which allows for dynamic observation of embryo development, acquisition of useful information and assists research on morphology evaluation and morphological parameters. Some experiments indicated that morphokinetic parameters can help to select high-quality embryos and improve pregnant outcomes for the reason that they were closely related with development potential. A number of clinics have reported validated implantation prediction algorithms according to dynamic parameters while without a unified and valid standard. Moreover, the effectiveness and security of time-lapse system requires definitive evidence to support. The research progress of time-lapse system was summarized in this review. Key words: Embryo development; Time-lapse; Morphokinetics; Time parameters