The postpartum period is a time of great changes in the body. Levels of the female hormones estrogen and progesterone drop sharply in the hours after childbirth. These decreases may trigger depression, just as much smaller hormonal changes can trigger moodiness and tension before menstrual periods. Because some women are more sensitive to these changes than others, they may be more prone to having postpartum blues or depression. Thyroid levels may also drop sharply after birth.
Many women feel exhausted after labor and delivery.
It can take weeks for a woman to regain her normal strength and stamina. Also, new mothers seldom get the kind of rest they need. In the hospital, sleep is interrupted by visitors, hospital routine, and the baby's feedings. At home, the feedings and care continue around the clock, along with the usual household tasks. This fatigue and lack of sleep can go on for months and be a major reason for depression.