The progress of medicine in the recent decades has strongly improved perinatal care, especially its somatic-related aspects. Pregnancy and childbirth have become much safer, but the mental strain and stress have remained the same. The models of motherhood and the number of children in a family have changed, giving rise to significant requirements concerning the quality of life of the offspring. These changes have brought about new psychological challenge for women and a team of psychiatrists and gynaecologists – obstetricians. The aim of this study is to look at the affective disorders affecting women during pregnancy and postpartum: the postpartum depression and so-called baby blues, which were both compiled in the form of a table in the final part of this work to illustrate the differences between these two mental disorders.