The restricted diet for pregnant women

A pregnant Sara Dickerman wonders about why she can't eat what she isn't allowed to eat.

I'm in my eighth month of pregnancy, and so far I have sheepishly eaten several slivers of air-dried Serrano ham, a few crumbles of blue cheese, and one shimmering piece of yellowtail nigiri. Then, there's the red wine. It started with furtive thimblefuls (just to taste a new wine at the restaurant where I work!) but has spiraled out of control into a biweekly half-glass. All of these items are on the do-not-consume list for pregnant women, but no one seems to be able to tell me how much of a risk occasional lapses like mine pose to my baby.