Nonidentical twins with a single placenta -- disproving dogma in perinatal pathology

Article Abstract:

The formation of different types of twin fetuses and their associated placentas is described in detail to help readers understand a study published in the July 10, 2003 issue of the New England Journal of Medicine that refutes the idea that a twin pregnancy with only one placenta must always be identical twins. The case involved a twin pregnancy with only one placenta but the twins were fraternal, a male and a female. The pregnancy was a result of in vitro fertilization, which may have caused this result.

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A report of dizygous monochorionic twins

Article Abstract:

The case of two twin babies who shared the same placenta is reported. Normally, twins who share the same placenta are identical twins of the same sex. But these twins were fraternal and were male and female. They were the result of in vitro fertilization, which may have been responsible for causing this unusual twin pregnancy.

Health aspects

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