Following an editorial in the NY Times  Jul 23 2007

Following an editorial in the NY Times by Steven Shaw about doctors' food recommendations for pregnant women, my wife Meg wrote a post about how she ate while pregnant. "I found my balance between enjoying food and tolerating risk, and it included the occasional Wellfleet on the half-shell. It's easy to get overwhelmed by all the recommendations, and to live in fear of every bite of food you put into your mouth. But that makes for a very stressful, anxious, long nine (plus) months. And that certainly isn't good for the fetus."

To Dr. David Hague, human pregnancy is  Mar 15 2006

To Dr. David Hague, human pregnancy is a struggle between the fetus and mother. Evolutionarily speaking, the fetus "wants" as many resources as possible for itself while the mother "wants" to do what she can to spread her resources across as many children as possible. In theory, this is a cause of the many serious health problems surrounding pregnancy.

Update: Carl Zimmer has more about this on his blog.