The following embryos were staged using Hamburger and Hamilton's guidelines.

Chick embryo HH stage 4	Chick embryo HH stage 11	Chick embryo HH stage 20

Chick embryo HH stage 25	Chick embryo HH stage 25	Chick embryo HH stage 26

Click here for more information on HH staging.

Click here for more staged embryo images.

Images labeled by the students in the Tuesday lab section of Judy Cebra-Thomas's Developmental Biology class Swarthmore College 2004