In twin pregnancy with acardia, which occurs in about 1 in 35,000deliveries, the heart and usually other organs fail to developin one twin.1 The acardiac ("recipient") twin receives bloodfrom the normal ("pump") twin, and the blood is then returnedto the normal twin.2 The natural history is variable, and somepregnancies proceed to term. Commonly, the acardiac twin becomesgrossly edematous, and its size may exceed that of the pumptwin. Hydramnios may occur in either sac. The perinatal mortalityrate for pump twins is around 55 percent, with death due mainlyto congestive cardiac failure or . . . [Full Text of this Article]
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From the Fetal Medicine Unit, Department of Obstetrics and Gynaecology, University College London Medical School, 86-96 Chenies Mews, London WC1E 6HX, United Kingdom, where reprint requests should be addressed to Dr. Rodeck.
References
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