Final answer:
Postpartum depression is most likely related to changes in hormone levels. Hormones like estrogen, progesterone, and hCG are involved in maintaining pregnancy, and disturbances in hormone secretion can contribute to postpartum depression. Research has shown that these hormonal changes are associated with maternal postnatal depression and can predict subsequent depressive symptoms in adolescents.
Step-by-step explanation:
Postpartum depression is most likely related to changes in hormone levels. Hormones, such as estrogen, progesterone, and hCG, play a crucial role during pregnancy. After childbirth, the sudden drop in hormone levels can contribute to the development of postpartum depression.
Research has shown that disturbances in hormone secretion, such as cortisol, are associated with maternal postnatal depression, which can predict subsequent depressive symptoms in adolescents.