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Questioning conclusions on prenatal nutritional supplementation.

Rush, Stein, and Susser1 tell us that pregnant women receiving a high protein supplement were more likely to deliver prematurely than those receiving a complement (balanced calories and protein). Furthermore, they claim that these premature babies were significantly lower in birth weight than the premature babies of the complement and control groups. However, there was no statistically greater incidence of premature births in the supplement group than in the other two groups combined, nor were there significantly more perinatal deaths.