Birth Hazard of the Second Twin

30 November 1963

journal article
research article
Published by American Medical Association (AMA)

Vol. 186 (9) , 869-870
https://doi.org/10.1001/jama.1963.63710090019020c

Abstract

IN THE COURSE of reviewing the literature on the survival of twins, the writers have been struck by a fact on which Camilleri¹and Tow²have also recently commented, namely, that the total evidence available indicates a much higher risk to the second twin than most authors appear to have conceded. In only two of the studies listed in the table does the absolute number of deaths for the first twin exceed those for the second—Aaron et al³and Romanowski.⁴ It is suggested that the claim of no higher risk for the second twin arises from conclusions based on a small series of cases where results, though in the direction of greater risk for the second twin, arenot striking or statistically significant. For example, Potter and Crunden⁵report "... second twin... no increase in birth hazard"; Bender,⁶"labour... no extra hazard for second..."; Ross

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