The drastic changes that take place in a woman's body can undoubtedly have a large impact on the lowering of mood during the postpartum period. These changes are particularly related to hormonal balance, which often lead to a disruption in the normal function of nerve cells in the brain. Shortly after childbirth, levels of progesterone, which was produced in large quantities by the placenta during pregnancy, and oestrogens begin to fall sharply. Such changes can contribute to a significant lowering of mood, and as a result, together with other factors, become the cause of so-called postpartum depression in the postpartum mother. The occurrence of postnatal depression in a young mother is influenced by a combination of different factors. The biggest influence is not only physical, but to a large extent psychological.

A number of experiences in a woman's life related to pregnancy and childbirth, as well as many others, such as a poor socio-economic situation, lack of support from the immediate family, excessive care for the child, etc., are not indifferent to her wellbeing. Even a stay in hospital away from relatives can cause feelings of loneliness and depression. This is because it is easier to overcome despondency at home among loved ones. As despondency is most likely to occur on the third or fourth postnatal day, the aim is to allow patients to leave the hospital as early as possible, provided, of course, that there are no indications of further hospitalisation for either her or the baby. Many mothers, upon leaving home, panic about whether they can cope with everything and whether they will be fulfilled as a mother.