Vitamins are really important. PPD can be caused by a deficiency in B vitamins. Also, its important to make sure she is getting Omega 3 fatty acids which contain DHA (you can get these in salmon, trout etc). Pregnant and nursing moms lose alot of both of these, leaving them pretty blah and contributing to depression.
Sleep is a MUST, as well as communication and proper nutrition. She's got a big job
