File:CDC PHIL 10148 – candling, fertilized egg, non-viable.jpg

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Description Known as a quitter, this non-viable, fertilized egg was observed using what is known as a candling procedure, whereupon, a very bright light is placed behind the egg, as was done throughout history by using a candle, hence the name. Today, employing more modern methods, a powerful lamp is placed against the broad end of the egg. In this way, the contents of the egg are revealed through the translucent shell. In unfertilized eggs (PHIL 10147), known as yolkers, the observer will see only a round yolk sac, and no developing embryo, or any blood vessels. In the case of this quitter, note a thin blood ring encircling the yolk. Winners are eggs that are fertilized, and lead to the growth of a healthy embryo (PHIL 10149). In this case, one will observe blood vessels surrounding the yolk, and depending upon the length of gestation, one might see a dark shadow representing the developing embryonic eye.
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This media comes from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #10148.

Note: Not all PHIL images are public domain; be sure to check copyright status and credit authors and content providers.

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  • Content Provider(s): CDC / Dr. Joseph McDade

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This image is a work of the Centers for Disease Control and Prevention, part of the United States Department of Health and Human Services, taken or made as part of an employee's official duties. As a work of the U.S. federal government, the image is in the public domain.

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current11:30, 11 January 2023Thumbnail for version as of 11:30, 11 January 20231,200 × 1,803 (455 KB)Opencooper (talk | contribs){{Information |Description=Known as a quitter, this non-viable, fertilized egg was observed using what is known as a candling procedure, whereupon, a very bright light is placed behind the egg, as was done throughout history by using a candle, hence the name. Today, employing more modern methods, a powerful lamp is placed against the broad end of the egg. In this way, the contents of the egg are revealed through the translucent shell. In unfertilized eggs (PHIL 10147), known as yolkers, the o...

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