Please don't use this study as proof that alcohol is okay. You'll find that the women who did not drink "were the poorest educated, smoked the most, did not exercise, and watched a lot of TV." These, in my field, are what we call confounders and are much more important to look at.
http://www.today.com/moms/new-study-shows-no-harm-moderate-drinking-pregnancy-experts-urge-2D11849699
Confounders are things that change the relationship being examined. In this case, drinking was perhaps, less important than smoking, education, exercise, or television viewing. To report that drinking is okay in groups that are these different is at best wrong and at worst, harmful.
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