Postpartum Depression (PPD) is a common mental health condition that affects many women after childbirth, leading to emotional instability, anxiety, and depression, which can impact both the mother and the child. This study brings together findings from 15 research papers to understand the prevalence, risk factors, and effective ways to manage PPD in women after delivery. The review includes systematic reviews, meta- analyses, and cohort studies published between 2021 and 2025. The findings show that factors such as antenatal depression, hormonal changes, lack of social support, previous mental health issues, and intimate partner violence play a major role in increasing the risk of PPD. Different prediction methods, including logistic regression and machine learning models like Random Forest and SVM, have been used in recent studies. Among these, logistic regression and Random Forest showed the best accuracy, ranging from 85% to 90%. Interventions like CBT, interpersonal therapy, and regular physical activity were found to be effective in managing PPD.