Postpartum depression (PPD) is a kind of major depression with symptoms, including low mood, lack of pleasure, forgetfulness, irritability, sleep disorder, and poor performance, beginning five weeks postpartum (
1,
2). Postpartum depression is a multifactorial disorder from different biological, psychological, and sociological aspects (
3). It is dangerous for the mother and infant, and it can lead to infanticide (
4), impaired growth and health of the baby (
5), and even suicide (
6). A meta-analysis study in Iran reported the average prevalence of PPD at 28.7% (
7). Evidence shows that PPD has been a significant factor affecting maternal self-efficacy (
8).
Self-efficacy is one of the significant factors in the successful transition of the mother to the maternal role (
9). Maternal self-efficacy plays a major role in the mother's care skills and can lead to better adaptation to the situation (
10). Moreover, infant care behaviors are those behaviors that the mother does to care for, rear, and improve the infant’s health, such as meeting all the physical needs of the infant, like feeding, clothing, and bathing, to ensure the baby's health (
11).