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    Am J Obstet Gynecol. 1986 Jul;155(1):14-9.

    The "vanishing twin": ultrasonographic assessment of fetal disappearance in the first trimester.

    Abstract

    Review of the sonographic findings of 1000 pregnancies with viable gestations in the first trimester revealed a minimum incidence of twinning of 3.29%. Of these, 21.2% demonstrated the "vanishing twin" phenomenon, often with associated bleeding, but with a good prognosis for the remaining fetus. Ovulation induction did not appear to alter these data. The sonographic criteria for "vanishing twin" are discussed. The incidence of multiple gestation is 3.29% to 5.39%, higher than previously believed.

    PMID:
    3524235
    [PubMed - indexed for MEDLINE]

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