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Amniotic cavity and bilaminar embryonic disc

Section approximately through the middle of embryo. The amniotic cavity and the bilaminar embryonic disc can be seen, although an amnion as such is not yet distinct. The thick, solid trophoblast at the embryonic pole is mainly syncytiotrophoblast. The endometrial stroma is edematous.

Fig. 6. O'Rahilly and Müller, 1987.

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Keywords: amnion, amniotic cavity, bilaminar embryonic disc, embryo, endometrial stroma, trophoblast

Source: The Virtual Human Embryo.