Bidirectional relationship betw Autoimmune disease (AD) & perinatal depression (PND); 1:10 case control study of 1.3 milion pregnancies & 55,299 incident PND found AD preg w/ a 30% (OR 1.3) higher risk of PND & PND had a 30% ^ risk (OR 1.3) of AD https://t.co/JoF1sQY2WM https://t.co/ZrQMiL5IsR