2Dowlatshahi D, Paykel ES. Life events and social stress in puerperal psychoses : absence of effect [J]. Psychol Med, 1990,20:655.
3Aolber L. Obstetricsand gynecology [J]. Clin North Am, 1997,24 ( 3 ) :535.
4Otchetf, Carey MS,Adaml. General health and psychological symptoms status in pregnancy and the puerperium : What is normal [J]. Obstet Gynecol, 1999,94:935 - 941,