Fig. 13. O'Rahilly and Müller, 1987
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| Embryo 7700 - Stage 5c | Fig. 13. O'Rahilly and Müller, 1987 |
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| Section through the middle of the embryo. The space outlined by the internal surface of the chorion now appears distended again. However, a gradient of differentiating trophoblast from abembryonic to embryonic pole is still evident. Intercommunicating lacunae are visible in the syncytiotrophoblast. The primary umbilical vesicle, surrounded by a meshwork, can be seen. The endometrial stroma is edematous and decidua is developing. | |
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