Pregnacy Cravings

[rinkytink]

Further to madham's question about pregnacy cravings - why do pregnant women have cravings for certain fooods (or sometimes non-foods)? Often foods that they would find disgusting normaly. Do any other species have cravings during pregnancy ?

[tracymort]

It's called pica and there's a bit about it here http://www.birthsource.com/articlefile/Article78.html