Time-lapse is an imaging technology that enables us to observe slow-developing processes with finer detail, changes that are invisible to the naked eye. Inside an incubator equipped with Time-lapse technology, a camera takes photographs of embryos at multiple levels at fixed intervals (e.g., every 10 or 20 minutes). Using these photographs to create video footage, embryologists can observe the entire developmental process of a single embryo or multiple embryos as needed.