70. discussion : in this study , combined fruit and vegetable intake declined during pregnancy , although most of this decline was accounted for by a decline in vegetable servings.
71. differences may have been significant if the study had been more adequately powered.
72. a meta-analysis of nutrition education intervention research among pregnant women had noted significant self-reported differences in similar dietary measurements when total sample sizes ranged from n=43 to n=173, a wide range that made effect size difficult to determine for power analysis.