Essay about Egg Windowing
Ramon Magsaysay High School - Espaǹa
Arturo A. Tolentino,
Caloocan City Science High School
study of development has been greatly aided by the use of the chick embryo as an experimental model.
It is necessary to open the eggshell and reclose it without perturbing the embryo's growth. The embryo can be examined at successive developmental stages by re-opening the eggshell.
at 37°C with relative humidity that was set above
60%, remove the eggs from the incubator. Turn
eggs 90 degrees so that the large base lies horizontal where your embryo is located. Saturate
a stack of nonsterile gauze with 70% ethanol. Use
two …show more content…
the scissors and repeat going in the opposite direction until only a small bit of the egg remains attached.
Check to be sure the egg is fertilized.
Shut the window.
about a 2-3" long by 1/2" wide plastic tape and shut the window so it fits back into the hole that was cut. Take another 1 x 1" piece of tape and seal the hole from which the egg was drained. Use a pair of forceps to reopen the egg to do any manipulations.
When you're ready to return the eggs to the incubator, cut a piece of tape that is large enough to seal the window and cover the entire horizontal surface of the egg.
Exp. 2007; (8): 306.
Published online 2007 October
1. doi: 10.3791/306
Matthew J. Korn and Karina S. Cramer
Windowing Chicken Eggs for
Avian egg is a useful animal model for studies concerning early embryonic development. The model is particularly advantageous of the ease by which the avian embryo may be accessed and handled.
Numerous bioassays revolving around avian embryos have been developed..
Avian eggs may be used for teratogenicity studies. Choriooallantoic membrane (CAM assay.
• Process by which the egg is opened and the embryo revealed for manipulation.
1.Perform egg candling in order to determine the position of the embryo. This can be done by holding the egg