I'm still struggling silently to wrap my head around that article from the Times the other day, the one about pregnancy being a subtle struggle between the competing self-interests of the mother and the fetus. It's fascinating stuff, but the genetic/evolutionary interpretations are kind of hard to follow, in that meta-analytical, "i know he knows we know he knows" kind of way.
Still, interesting stuff, and the theories--developed by Dr David Haig of Harvard--are apparently emerging as the first coherent explanation for a variety of pregnancy-related illnesses, and some gene-linked birth disorders.
"Silent Struggle: A New Theory of Pregnancy" by Carl Zimmer [nyt]
Zimmer expands on the article here, "Mothers, Children, and Genes in Conflict" [the loom via kottke]