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Leopard Gecko Egg Candling

Leopard Gecko Egg Being Candled

Leopard Gecko Egg Candling

Leopard Gecko Egg Candling

Egg candling does not involve any type of flame, or candle for that matter. Egg candling is the means in which you view the developing embryo within an egg to determine the eggs fertility and embryo development.

Candling is done in a dark room with the egg held on top of, or in front of a strong light. As the light penetrates the egg, it lights it up and makes it possible to observe the inside of the egg. Candling leopard gecko eggs should occur no sooner than 2 weeks after the egg has been laid. This will allow the embryo some time to develop, which is important if you wish to see anything.

There are commercially available egg-candlers on the market, but a mini mag flashlight is ideal.

Before you candle a leopard gecko egg, you want to ensure that the egg is marked with a pen or sharpie on the "top". This will help prevent you from flipping the egg upside down and drowning the embryo.

Hold the light below, above, or on the side of the egg, with the marked side up, and the egg should light up. Once lit, look for some light pinkish coloring, as well as developing veins on the egg surface. These veins are carrying the nutrients to the embryo.

If the egg appears yellow or clear inside, and there are no veins present, repeat the candling again in another 2 weeks. If there are still no signs of veins or pink coloration after 4 weeks, there is a very high probability that the egg is not viable. If an egg does not candle well, don't be discouraged. I never discard an egg based on the findings of candling. I have had eggs that did not display the attributes of fertility but have still hatched out a leopard gecko.

Egg Candling Image

The image above shows a fertile leopard gecko egg. There are very visible veins on this egg indicating that there is a developing embryo within. Candling an egg too soon may not show the clearly visible veins in the image and can give you a false result.


Author: Richard Brooks
Egg Candling Image © Penny Chye