>Postpartum depression is much lower in places where mothers get a lot of sunshine, live among numerous family and friends, eat whole diets, walk a lot, and don

>Postpartum depression is much lower in places where mothers get a lot of sunshine, live among numerous family and friends, eat whole diets, walk a lot, and don't suddenly go from rat-race identity-capturing careers to soloing a screaming infant inside all day. Do you have a source for this?