File:CDC PHIL 10149 – fertilized egg, 11 days old.jpg

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Description Referred to as a winner, this healthy, 11-day-old fertilized egg was observed using 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, no developing embryo, and no blood vessels. In the case of quitters (PHIL 10148), which are fertilized eggs that have stopped growing, you will note a thin blood ring encircling the yolk. This winner revealed numbers of networked 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 #10149.

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 20231,206 × 1,789 (246 KB)Opencooper (talk | contribs){{Information |Description=Referred to as a winner, this healthy, 11-day-old fertilized egg was observed using 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 obser...

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