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placenta p34

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Anastomoses<br />

• Insertion des cordons proche<br />

• Anastomoses superficielles :<br />

– artério-artérielle, veino-veineuses : rares<br />

– bénéfiques en cas de STT<br />

• Anastomoses profondes :<br />

– artère-artère<br />

– veine-veine<br />

– artério-veineuses = 3ème circulation = STT : échanges<br />

circulatoires entre les 2 jumeaux, bidirectionnels, labiles,<br />

variables<br />

• plaque choriale : artère grêle plonge en regard d’une<br />

veine turgescente émergente

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