Image GalleryFree Blastocyst (without zona) |
![Free Blastocyst (without zona) [Click for next image]](http://media.ehd.org/images/prenatal_numbered_655/free-blastocyst-without-zona-.jpg "Click for next image")
Note:This close-up reveals the absence of the zona and the large size of the blastocyst cavity. The inner cell mass is tiny by comparison.Label Key:
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| Source: Centro Riproduzione Assistita, Catania, Italy. All ages referenced to fertilization, not last menstrual period. |
Free Blastocyst (without zona)
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Embryo Cross Section 8-9 Days
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Embryo at About 11 Days
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Tube Shaped Heart
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Three-Week Embryo
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Left Lateral View: 3-Week Embryo
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