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placenta p34

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Grossesses gémellaires<br />

• Grossesses bizygotes : PMA 1/80 à 1/50<br />

• Grossesses monozygotes : stable 3,5/1000<br />

• surcroît de pathologie lié à la grossesse gémellaire<br />

– RCIU<br />

– MAP<br />

– MFIU<br />

• selon les populations<br />

– Nigeria (Yoruba) : 95 % bibi, 5% monobi<br />

– USA : 70% bibi, 29% monobi, 1% monomono<br />

– japon : 47% bibi, 50% monobi, 3% monomono<br />

• Avance de maturation <strong>placenta</strong>ire gémellaire/singleton<br />

(grade échographique, histologie) terme : 38 SA

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