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Science. 1981 Aug 14;213(4509):775-7.

Genetic studies of an acardiac monster: evidence of polar body twinning in man.

Abstract

Two maternally derived chromosome sets and both maternal histocompatibility antigen haplotypes were identified in the tissues of a malformed triploid acardiac twin that developed within the same chorion as its normal twin. These findings indicate that the twins arose as a result of independent fertilizations, by two different spermatozoa, of a normal haploid ovum and its diploid first-meiotic-division polar body.

PMID:
7196086
[PubMed - indexed for MEDLINE]
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