A proper evolutionary accounting of pregnancy sickness was formulated in 1992, when the biologist Margie Profet articulated the compelling argument that it is an intricate adaptive mechanism. (Profet, who was awarded a MacArthur ?genius grant? in 1993, was in the news recently for emerging after a long and mysterious absence.) She noted that, while teratogenic goodies like absinthe and mocha lattes weren?t exactly a threat to our pregnant ancestors in the African savannas hundreds of thousands of years ago, such products do have high concentrations of so-called secondary plant compounds. These phytochemicals deter or kill plant enemies such as insects, fungi, and bacteria. They?re usually harmless to humans, but when consumed in large quantities, they can be allergens, carcinogens, mutagens and, in pregnant women, teratogens and even abortion-inducing agents.
Source: http://feeds.slate.com/click.phdo?i=dbd180263f313a366c50d7b373770158
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