Mortality among twins

doi:10.1136/bmj.310.6990.1330c

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D I W Phillips

Clinical scientist Metabolic Programming Group, University of Southampton, Southampton General Hospital, Southampton SO16 6YD

EDITOR,—Kaare Christensen and colleagues' study of the lifetime mortality of the 24% of Danish twins whom they were able to trace is offered as a challenge to the validity of the fetal origins hypothesis.1 The authors assume that if growth retardation in fetal life were associated with cardiovascular disease then twins, who have a lower birth weight …