The Time-Lapse Imaging-Incubator System, which is attracting attention in the field of reproductive medicine, is an imaging system that can perform imaging and culture at the same time and has two capabilities. The first capability is that it can be used to observe embryo development. Furthermore, more information can be obtained by analyzing embryo growth at different time points than by morphological observation at a single point in time. The second capability is that it can be used to perform embryonic observation with images direct observation with a microscope is not necessary. This system enables continuous observation and continuous culture that maintains the hypoxic environment without the need to expose embryos entirely to air in a series of culture periods during embryo growth.