This educational poster set shows the stages of development of a chicken embryo inside the egg. The first poster shows days 0-6, the second has images of days 12-21, and the third pictures the actual hatching of the chick at day 21. Posters can be attached for a complete diagram of the development process. Each section measures 21 inches by 7 ¼ inches. This set is perfect for classroom use during hatching and incubation lessons.